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ICMP-Chat 0.6
ICMP-Chat is a simple console-based chat that uses ICMP packets for communication. more>>
ICMP-Chat is a simple console-based chat that uses ICMP packets for communication. All the data is encrypted with Rijndael-256 algorithm.
Installation:
Type: make && make install
For solaris type: make solaris && make install
Usage:
Usage: icmpchat [OPTIONS] < host > < nick >
< host > = Host to chat with
< nick > = Your nickname
OPTIONS:
-t < type > = specify icmp type (default ECHO_REPLY)
Example: icmpchat 192.168.1.2 foo
ICMP codes:
[0] Echo Reply
[5] Redirect
[8] Echo Request
[9] Router advertisement
[10] Router solicitation
[13] Timestamp request
[14] Timestamp reply
[15] Information request
[16] Information reply
[17] Adressmask request
[18] Adressmask reply
Enhancements:
- Rewrote from scratch
- Implemented optimized rijndael algorithm
- Implemented sha256 for password hashing
- Implemented ncurses frontend (again)
- Fixed getuid problem so that setting suid flag works now (thanks John)
<<lessInstallation:
Type: make && make install
For solaris type: make solaris && make install
Usage:
Usage: icmpchat [OPTIONS] < host > < nick >
< host > = Host to chat with
< nick > = Your nickname
OPTIONS:
-t < type > = specify icmp type (default ECHO_REPLY)
Example: icmpchat 192.168.1.2 foo
ICMP codes:
[0] Echo Reply
[5] Redirect
[8] Echo Request
[9] Router advertisement
[10] Router solicitation
[13] Timestamp request
[14] Timestamp reply
[15] Information request
[16] Information reply
[17] Adressmask request
[18] Adressmask reply
Enhancements:
- Rewrote from scratch
- Implemented optimized rijndael algorithm
- Implemented sha256 for password hashing
- Implemented ncurses frontend (again)
- Fixed getuid problem so that setting suid flag works now (thanks John)
Download (0.037MB)
Added: 2006-06-16 License: GPL (GNU General Public License) Price:
1229 downloads
NAT iptables firewall script
NAT iptables firewall script is an iptables firewall script. more>>
NAT iptables firewall script is an iptables firewall script.
This script is meant to be run once per boot the rules will be double added if you try to run it twice if you need to add another rule during runtime, change the -A to a -I to add it to the top of the list of rules if you use -A it will go at the end after the reject rule.
Sample:
# interface definitions
BAD_IFACE=eth0
DMZ_IFACE=eth1
DMZ_ADDR=x.x.x.96/28
GOOD_IFACE=eth2
GOOD_ADDR=192.168.1.0/24
MASQ_SERVER=x.x.x.98
FTP_SERVER=x.x.x.100
MAIL_SERVER=x.x.x.99
MAIL_SERVER_INTERNAL=192.168.1.3
# testing
#set -x
ip route del x.x.x.96/28 dev $BAD_IFACE
ip route del x.x.x.96/28 dev $DMZ_IFACE
ip route add x.x.x.97 dev $BAD_IFACE
ip route add x.x.x.96/28 dev $DMZ_IFACE
# we need proxy arp for the dmz network
echo 1 > /proc/sys/net/ipv4/conf/eth0/proxy_arp
echo 1 > /proc/sys/net/ipv4/conf/eth1/proxy_arp
# turn on ip forwarding
echo 1 > /proc/sys/net/ipv4/ip_forward
# turn on antispoofing protection
for f in /proc/sys/net/ipv4/conf/*/rp_filter; do echo 1 > $f; done
# flush all rules in the filter table
#iptables -F
# flush built in rules
iptables -F INPUT
iptables -F OUTPUT
iptables -F FORWARD
# deny everything for now
iptables -A INPUT -j DROP
iptables -A FORWARD -j DROP
iptables -A OUTPUT -j DROP
# make the chains to define packet directions
# bad is the internet, dmz is our dmz, good is our masqed network
iptables -N good-dmz
iptables -N bad-dmz
iptables -N good-bad
iptables -N dmz-good
iptables -N dmz-bad
iptables -N bad-good
iptables -N icmp-acc
# accept related packets
iptables -A FORWARD -m state --state INVALID -j DROP
iptables -A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
# internal client masqing
iptables -t nat -A POSTROUTING -s $GOOD_ADDR -o $BAD_IFACE -j SNAT --to $MASQ_SERVER
# mail server masqing
iptables -t nat -A PREROUTING -p tcp -d $MAIL_SERVER --dport smtp -j DNAT --to $MAIL_SERVER_INTERNAL:25
iptables -t nat -A PREROUTING -p tcp -d $MAIL_SERVER --dport http -j DNAT --to $MAIL_SERVER_INTERNAL:80
iptables -t nat -A PREROUTING -p tcp -d $MAIL_SERVER --dport https -j DNAT --to $MAIL_SERVER_INTERNAL:443
# to allow the above to work you need something like
# iptables -A bad-good -p tcp --dport smtp -d $MAIL_SERVER_INTERNAL -j ACCEPT
# set which addresses jump to which chains
iptables -A FORWARD -s $GOOD_ADDR -o $DMZ_IFACE -j good-dmz
iptables -A FORWARD -s $GOOD_ADDR -o $BAD_IFACE -j good-bad
iptables -A FORWARD -s $DMZ_ADDR -i $DMZ_IFACE -o $BAD_IFACE -j dmz-bad
iptables -A FORWARD -s $DMZ_ADDR -i $DMZ_IFACE -o $GOOD_IFACE -j dmz-good
iptables -A FORWARD -o $DMZ_IFACE -j bad-dmz
iptables -A FORWARD -o $GOOD_IFACE -j bad-good
# drop anything that doesnt fit these
iptables -A FORWARD -j LOG --log-prefix "chain-jump "
iptables -A FORWARD -j DROP
# icmp acceptance
iptables -A icmp-acc -p icmp --icmp-type destination-unreachable -j ACCEPT
iptables -A icmp-acc -p icmp --icmp-type source-quench -j ACCEPT
iptables -A icmp-acc -p icmp --icmp-type time-exceeded -j ACCEPT
iptables -A icmp-acc -p icmp --icmp-type echo-request -j ACCEPT
iptables -A icmp-acc -p icmp --icmp-type echo-reply -j ACCEPT
# iptables -A icmp-acc -j LOG --log-prefix "icmp-acc "
iptables -A icmp-acc -j DROP
# from internal to dmz
iptables -A good-dmz -p tcp --dport smtp -j ACCEPT
iptables -A good-dmz -p tcp --dport pop3 -j ACCEPT
iptables -A good-dmz -p udp --dport domain -j ACCEPT
iptables -A good-dmz -p tcp --dport domain -j ACCEPT
iptables -A good-dmz -p tcp --dport www -j ACCEPT
iptables -A good-dmz -p tcp --dport https -j ACCEPT
iptables -A good-dmz -p tcp --dport ssh -j ACCEPT
iptables -A good-dmz -p tcp --dport telnet -j ACCEPT
iptables -A good-dmz -p tcp --dport auth -j ACCEPT
iptables -A good-dmz -p tcp --dport ftp -j ACCEPT
iptables -A good-dmz -p tcp --dport 1521 -j ACCEPT
iptables -A good-dmz -p icmp -j icmp-acc
iptables -A good-dmz -j LOG --log-prefix "good-dmz "
iptables -A good-dmz -j DROP
# from external to dmz
iptables -A bad-dmz -p tcp --dport smtp -j ACCEPT
iptables -A bad-dmz -p udp --dport domain -j ACCEPT
iptables -A bad-dmz -p tcp --dport domain -j ACCEPT
iptables -A bad-dmz -p tcp --dport www -j ACCEPT
iptables -A bad-dmz -p tcp --dport https -j ACCEPT
iptables -A bad-dmz -p tcp --dport ssh -j ACCEPT
iptables -A bad-dmz -p tcp -d $FTP_SERVER --dport ftp -j ACCEPT
iptables -A bad-dmz -p icmp -j icmp-acc
iptables -A bad-dmz -j LOG --log-prefix "bad-dmz "
iptables -A bad-dmz -j DROP
# from internal to external
iptables -A good-bad -j ACCEPT
# iptables -t nat -A POSTROUTING -o $BAD_IFACE -j SNAT --to $MASQ_SERVER
#iptables -A good-bad -p tcp -j MASQ
#iptables -A good-bad -p udp -j MASQ
#iptables -A good-bad -p icmp -j MASQ
#ipchains -A good-bad -p tcp --dport www -j MASQ
#ipchains -A good-bad -p tcp --dport ssh -j MASQ
#ipchains -A good-bad -p udp --dport 33434:33500 -j MASQ
#ipchains -A good-bad -p tcp --dport ftp -j MASQ
#ipchains -A good-bad -p icmp --icmp-type ping -j MASQ
#ipchains -A good-bad -j REJECT -l
# from dmz to internal
# iptables -A dmz-good -p tcp ! --syn --sport smtp -j ACCEPT
iptables -A dmz-good -p tcp --dport smtp -j ACCEPT
iptables -A dmz-good -p tcp --sport smtp -j ACCEPT
iptables -A dmz-good -p udp --sport domain -j ACCEPT
iptables -A dmz-good -p tcp ! --syn --sport domain -j ACCEPT
iptables -A dmz-good -p tcp ! --syn --sport www -j ACCEPT
iptables -A dmz-good -p tcp ! --syn --sport ssh -j ACCEPT
iptables -A dmz-good -p tcp -d 192.168.1.34 --dport smtp -j ACCEPT
iptables -A dmz-good -p icmp -j icmp-acc
iptables -A dmz-good -j LOG --log-prefix "dmz-good "
iptables -A dmz-good -j DROP
# from dmz to external
iptables -A dmz-bad -p tcp --dport smtp -j ACCEPT
iptables -A dmz-bad -p tcp --sport smtp -j ACCEPT
iptables -A dmz-bad -p udp --dport domain -j ACCEPT
iptables -A dmz-bad -p tcp --dport domain -j ACCEPT
iptables -A dmz-bad -p tcp --dport www -j ACCEPT
iptables -A dmz-bad -p tcp --dport https -j ACCEPT
iptables -A dmz-bad -p tcp --dport ssh -j ACCEPT
iptables -A dmz-bad -p tcp --dport ftp -j ACCEPT
iptables -A dmz-bad -p tcp --dport whois -j ACCEPT
iptables -A dmz-bad -p tcp --dport telnet -j ACCEPT
iptables -A dmz-bad -p udp --dport ntp -j ACCEPT
# ipchains -A good-bad -p udp --dport 33434:33500 -j MASQ
iptables -A dmz-bad -p icmp -j icmp-acc
iptables -A dmz-bad -j LOG --log-prefix "dmz-bad "
iptables -A dmz-bad -j DROP
# from external to internal
iptables -A bad-good -p tcp --dport smtp -d $MAIL_SERVER_INTERNAL -j ACCEPT
iptables -A bad-good -p tcp --dport http -d $MAIL_SERVER_INTERNAL -j ACCEPT
iptables -A bad-good -p tcp --dport https -d $MAIL_SERVER_INTERNAL -j ACCEPT
iptables -A bad-good -j LOG --log-prefix "bad-good "
iptables -A bad-good -j REJECT
# rules for this machine itself
iptables -N bad-if
iptables -N dmz-if
iptables -N good-if
# set up the jumps to each chain
iptables -A INPUT -i $BAD_IFACE -j bad-if
iptables -A INPUT -i $DMZ_IFACE -j dmz-if
iptables -A INPUT -i $GOOD_IFACE -j good-if
# external iface
iptables -A bad-if -p icmp -j icmp-acc
iptables -A bad-if -j ACCEPT
#ipchains -A bad-if -i ! ppp0 -j DENY -l
#ipchains -A bad-if -p TCP --dport 61000:65095 -j ACCEPT
#ipchains -A bad-if -p UDP --dport 61000:65095 -j ACCEPT
#ipchains -A bad-if -p ICMP --icmp-type pong -j ACCEPT
#ipchains -A bad-if -j icmp-acc
#ipchains -A bad-if -j DENY
# dmz iface
iptables -A bad-if -p icmp -j icmp-acc
iptables -A dmz-if -j ACCEPT
# internal iface
iptables -A good-if -p tcp --dport ssh -j ACCEPT
iptables -A good-if -p ICMP --icmp-type ping -j ACCEPT
iptables -A good-if -p ICMP --icmp-type pong -j ACCEPT
iptables -A good-if -j icmp-acc
iptables -A good-if -j DROP
# remove the complete blocks
iptables -D INPUT 1
iptables -D FORWARD 1
iptables -D OUTPUT 1
<<lessThis script is meant to be run once per boot the rules will be double added if you try to run it twice if you need to add another rule during runtime, change the -A to a -I to add it to the top of the list of rules if you use -A it will go at the end after the reject rule.
Sample:
# interface definitions
BAD_IFACE=eth0
DMZ_IFACE=eth1
DMZ_ADDR=x.x.x.96/28
GOOD_IFACE=eth2
GOOD_ADDR=192.168.1.0/24
MASQ_SERVER=x.x.x.98
FTP_SERVER=x.x.x.100
MAIL_SERVER=x.x.x.99
MAIL_SERVER_INTERNAL=192.168.1.3
# testing
#set -x
ip route del x.x.x.96/28 dev $BAD_IFACE
ip route del x.x.x.96/28 dev $DMZ_IFACE
ip route add x.x.x.97 dev $BAD_IFACE
ip route add x.x.x.96/28 dev $DMZ_IFACE
# we need proxy arp for the dmz network
echo 1 > /proc/sys/net/ipv4/conf/eth0/proxy_arp
echo 1 > /proc/sys/net/ipv4/conf/eth1/proxy_arp
# turn on ip forwarding
echo 1 > /proc/sys/net/ipv4/ip_forward
# turn on antispoofing protection
for f in /proc/sys/net/ipv4/conf/*/rp_filter; do echo 1 > $f; done
# flush all rules in the filter table
#iptables -F
# flush built in rules
iptables -F INPUT
iptables -F OUTPUT
iptables -F FORWARD
# deny everything for now
iptables -A INPUT -j DROP
iptables -A FORWARD -j DROP
iptables -A OUTPUT -j DROP
# make the chains to define packet directions
# bad is the internet, dmz is our dmz, good is our masqed network
iptables -N good-dmz
iptables -N bad-dmz
iptables -N good-bad
iptables -N dmz-good
iptables -N dmz-bad
iptables -N bad-good
iptables -N icmp-acc
# accept related packets
iptables -A FORWARD -m state --state INVALID -j DROP
iptables -A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
# internal client masqing
iptables -t nat -A POSTROUTING -s $GOOD_ADDR -o $BAD_IFACE -j SNAT --to $MASQ_SERVER
# mail server masqing
iptables -t nat -A PREROUTING -p tcp -d $MAIL_SERVER --dport smtp -j DNAT --to $MAIL_SERVER_INTERNAL:25
iptables -t nat -A PREROUTING -p tcp -d $MAIL_SERVER --dport http -j DNAT --to $MAIL_SERVER_INTERNAL:80
iptables -t nat -A PREROUTING -p tcp -d $MAIL_SERVER --dport https -j DNAT --to $MAIL_SERVER_INTERNAL:443
# to allow the above to work you need something like
# iptables -A bad-good -p tcp --dport smtp -d $MAIL_SERVER_INTERNAL -j ACCEPT
# set which addresses jump to which chains
iptables -A FORWARD -s $GOOD_ADDR -o $DMZ_IFACE -j good-dmz
iptables -A FORWARD -s $GOOD_ADDR -o $BAD_IFACE -j good-bad
iptables -A FORWARD -s $DMZ_ADDR -i $DMZ_IFACE -o $BAD_IFACE -j dmz-bad
iptables -A FORWARD -s $DMZ_ADDR -i $DMZ_IFACE -o $GOOD_IFACE -j dmz-good
iptables -A FORWARD -o $DMZ_IFACE -j bad-dmz
iptables -A FORWARD -o $GOOD_IFACE -j bad-good
# drop anything that doesnt fit these
iptables -A FORWARD -j LOG --log-prefix "chain-jump "
iptables -A FORWARD -j DROP
# icmp acceptance
iptables -A icmp-acc -p icmp --icmp-type destination-unreachable -j ACCEPT
iptables -A icmp-acc -p icmp --icmp-type source-quench -j ACCEPT
iptables -A icmp-acc -p icmp --icmp-type time-exceeded -j ACCEPT
iptables -A icmp-acc -p icmp --icmp-type echo-request -j ACCEPT
iptables -A icmp-acc -p icmp --icmp-type echo-reply -j ACCEPT
# iptables -A icmp-acc -j LOG --log-prefix "icmp-acc "
iptables -A icmp-acc -j DROP
# from internal to dmz
iptables -A good-dmz -p tcp --dport smtp -j ACCEPT
iptables -A good-dmz -p tcp --dport pop3 -j ACCEPT
iptables -A good-dmz -p udp --dport domain -j ACCEPT
iptables -A good-dmz -p tcp --dport domain -j ACCEPT
iptables -A good-dmz -p tcp --dport www -j ACCEPT
iptables -A good-dmz -p tcp --dport https -j ACCEPT
iptables -A good-dmz -p tcp --dport ssh -j ACCEPT
iptables -A good-dmz -p tcp --dport telnet -j ACCEPT
iptables -A good-dmz -p tcp --dport auth -j ACCEPT
iptables -A good-dmz -p tcp --dport ftp -j ACCEPT
iptables -A good-dmz -p tcp --dport 1521 -j ACCEPT
iptables -A good-dmz -p icmp -j icmp-acc
iptables -A good-dmz -j LOG --log-prefix "good-dmz "
iptables -A good-dmz -j DROP
# from external to dmz
iptables -A bad-dmz -p tcp --dport smtp -j ACCEPT
iptables -A bad-dmz -p udp --dport domain -j ACCEPT
iptables -A bad-dmz -p tcp --dport domain -j ACCEPT
iptables -A bad-dmz -p tcp --dport www -j ACCEPT
iptables -A bad-dmz -p tcp --dport https -j ACCEPT
iptables -A bad-dmz -p tcp --dport ssh -j ACCEPT
iptables -A bad-dmz -p tcp -d $FTP_SERVER --dport ftp -j ACCEPT
iptables -A bad-dmz -p icmp -j icmp-acc
iptables -A bad-dmz -j LOG --log-prefix "bad-dmz "
iptables -A bad-dmz -j DROP
# from internal to external
iptables -A good-bad -j ACCEPT
# iptables -t nat -A POSTROUTING -o $BAD_IFACE -j SNAT --to $MASQ_SERVER
#iptables -A good-bad -p tcp -j MASQ
#iptables -A good-bad -p udp -j MASQ
#iptables -A good-bad -p icmp -j MASQ
#ipchains -A good-bad -p tcp --dport www -j MASQ
#ipchains -A good-bad -p tcp --dport ssh -j MASQ
#ipchains -A good-bad -p udp --dport 33434:33500 -j MASQ
#ipchains -A good-bad -p tcp --dport ftp -j MASQ
#ipchains -A good-bad -p icmp --icmp-type ping -j MASQ
#ipchains -A good-bad -j REJECT -l
# from dmz to internal
# iptables -A dmz-good -p tcp ! --syn --sport smtp -j ACCEPT
iptables -A dmz-good -p tcp --dport smtp -j ACCEPT
iptables -A dmz-good -p tcp --sport smtp -j ACCEPT
iptables -A dmz-good -p udp --sport domain -j ACCEPT
iptables -A dmz-good -p tcp ! --syn --sport domain -j ACCEPT
iptables -A dmz-good -p tcp ! --syn --sport www -j ACCEPT
iptables -A dmz-good -p tcp ! --syn --sport ssh -j ACCEPT
iptables -A dmz-good -p tcp -d 192.168.1.34 --dport smtp -j ACCEPT
iptables -A dmz-good -p icmp -j icmp-acc
iptables -A dmz-good -j LOG --log-prefix "dmz-good "
iptables -A dmz-good -j DROP
# from dmz to external
iptables -A dmz-bad -p tcp --dport smtp -j ACCEPT
iptables -A dmz-bad -p tcp --sport smtp -j ACCEPT
iptables -A dmz-bad -p udp --dport domain -j ACCEPT
iptables -A dmz-bad -p tcp --dport domain -j ACCEPT
iptables -A dmz-bad -p tcp --dport www -j ACCEPT
iptables -A dmz-bad -p tcp --dport https -j ACCEPT
iptables -A dmz-bad -p tcp --dport ssh -j ACCEPT
iptables -A dmz-bad -p tcp --dport ftp -j ACCEPT
iptables -A dmz-bad -p tcp --dport whois -j ACCEPT
iptables -A dmz-bad -p tcp --dport telnet -j ACCEPT
iptables -A dmz-bad -p udp --dport ntp -j ACCEPT
# ipchains -A good-bad -p udp --dport 33434:33500 -j MASQ
iptables -A dmz-bad -p icmp -j icmp-acc
iptables -A dmz-bad -j LOG --log-prefix "dmz-bad "
iptables -A dmz-bad -j DROP
# from external to internal
iptables -A bad-good -p tcp --dport smtp -d $MAIL_SERVER_INTERNAL -j ACCEPT
iptables -A bad-good -p tcp --dport http -d $MAIL_SERVER_INTERNAL -j ACCEPT
iptables -A bad-good -p tcp --dport https -d $MAIL_SERVER_INTERNAL -j ACCEPT
iptables -A bad-good -j LOG --log-prefix "bad-good "
iptables -A bad-good -j REJECT
# rules for this machine itself
iptables -N bad-if
iptables -N dmz-if
iptables -N good-if
# set up the jumps to each chain
iptables -A INPUT -i $BAD_IFACE -j bad-if
iptables -A INPUT -i $DMZ_IFACE -j dmz-if
iptables -A INPUT -i $GOOD_IFACE -j good-if
# external iface
iptables -A bad-if -p icmp -j icmp-acc
iptables -A bad-if -j ACCEPT
#ipchains -A bad-if -i ! ppp0 -j DENY -l
#ipchains -A bad-if -p TCP --dport 61000:65095 -j ACCEPT
#ipchains -A bad-if -p UDP --dport 61000:65095 -j ACCEPT
#ipchains -A bad-if -p ICMP --icmp-type pong -j ACCEPT
#ipchains -A bad-if -j icmp-acc
#ipchains -A bad-if -j DENY
# dmz iface
iptables -A bad-if -p icmp -j icmp-acc
iptables -A dmz-if -j ACCEPT
# internal iface
iptables -A good-if -p tcp --dport ssh -j ACCEPT
iptables -A good-if -p ICMP --icmp-type ping -j ACCEPT
iptables -A good-if -p ICMP --icmp-type pong -j ACCEPT
iptables -A good-if -j icmp-acc
iptables -A good-if -j DROP
# remove the complete blocks
iptables -D INPUT 1
iptables -D FORWARD 1
iptables -D OUTPUT 1
Download (MB)
Added: 2007-02-14 License: GPL (GNU General Public License) Price:
603 downloads
Shell over ICMP 0.5
Shell over ICMP project allows a user to connect to a remote shell daemon, by using ICMP protocol instead of classical TCP. more>>
Shell over ICMP consists of two free and open source applications: one server and one client. Shell over ICMP project allows a user to connect to a remote shell daemon, by using ICMP protocol instead of classical TCP.
Entirely written in Python, soicmp is a working proof-of-concept to demonstrate that data can be transmitted across a network by hiding it in traffic that normally does not contain payloads.
How does it work?
The soicmp server is a daemon that must be started on the remote server. When the server receives a request from the client it looks into the packets payload. The payload must respect certain protocol rules. In detail the client must specify:
command
communication mode (echo|echo/reply)
authentication (y|n)
This is an example of a correct payload string sent by client to server:
$CMD ls -a $MODE echo/reply $PWD root2005 $END
If the payload matches with the server protocol specification then it will pipe the command to "/bin/sh" or "cmd.exe" and execute it. The server then reads the result from the pipe and sends it back to the client that will print it to stdout.
Moreover every client will send ICMP packets having id equal to the clients current process ID and will accept only ICMP replies having the same id value. This prevents output to be printed by other client instances running on the same workstation (this argument is also treated in the FAQs section).
Main features:
- Platform independent.
- Possibility to run soicmp daemon on multiple ethernet interfaces simultaneously handling multiple client connections.
- Possibility to specify the buffer size of outgoing packets.
- Client side source IP address spoofing.
- Remote client case-sensitive (plain texted) authentication.
- Possibility to select two communication types:
- One based on encapsulating command output in unique "one way" ICMP_ECHOREPLY (type 0) packets sent by server to client (see fig. 1).
- Another one that guarantees the correct packets delivering by using the request/response nature of ECHO and ECHOREPLY ICMP packet types (see fig.2)
- No listening sockets are listed by netstat or similar programs.
<<lessEntirely written in Python, soicmp is a working proof-of-concept to demonstrate that data can be transmitted across a network by hiding it in traffic that normally does not contain payloads.
How does it work?
The soicmp server is a daemon that must be started on the remote server. When the server receives a request from the client it looks into the packets payload. The payload must respect certain protocol rules. In detail the client must specify:
command
communication mode (echo|echo/reply)
authentication (y|n)
This is an example of a correct payload string sent by client to server:
$CMD ls -a $MODE echo/reply $PWD root2005 $END
If the payload matches with the server protocol specification then it will pipe the command to "/bin/sh" or "cmd.exe" and execute it. The server then reads the result from the pipe and sends it back to the client that will print it to stdout.
Moreover every client will send ICMP packets having id equal to the clients current process ID and will accept only ICMP replies having the same id value. This prevents output to be printed by other client instances running on the same workstation (this argument is also treated in the FAQs section).
Main features:
- Platform independent.
- Possibility to run soicmp daemon on multiple ethernet interfaces simultaneously handling multiple client connections.
- Possibility to specify the buffer size of outgoing packets.
- Client side source IP address spoofing.
- Remote client case-sensitive (plain texted) authentication.
- Possibility to select two communication types:
- One based on encapsulating command output in unique "one way" ICMP_ECHOREPLY (type 0) packets sent by server to client (see fig. 1).
- Another one that guarantees the correct packets delivering by using the request/response nature of ECHO and ECHOREPLY ICMP packet types (see fig.2)
- No listening sockets are listed by netstat or similar programs.
Download (0.58MB)
Added: 2006-11-07 License: GPL (GNU General Public License) Price:
1081 downloads
Packet filtering setup script
Packet filtering setup script by Anthony C. Zboralski. more>>
Packet filtering setup script by Anthony C. Zboralski. Adapted by Didi Damian for iptables version 1.0.0
Sample:
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
# Set up variables
EXT_IF="eth0"
INT_IF="eth1"
EXT_IP=24.x.x.x/32
INT_IP=192.168.0.1/32
EXT_NET=24.x.x.0/24
INT_NET=192.168.0.0/24
MASQ_NETS="192.168.0.0/24"
LOCAL_ADDRS="127.0.0.0/8 192.168.0.1/32 24.x.x.x/32"
MAIL_RELAY=24.x.x.x/32
SMB_ACCESS="192.168.0.2/32"
SMB_BCAST="192.168.0.255/32"
# Turn on IP forwarding
echo Turning on IP forwarding.
echo 1 > /proc/sys/net/ipv4/ip_forward
# Load the ip_tables module
echo Loading ip_tables module.
/sbin/modprobe ip_tables || exit 1
# I let the kernel dynamically load the other modules
echo Flush standard tables.
iptables --flush INPUT
iptables --flush OUTPUT
iptables --flush FORWARD
echo Deny everything until firewall setup is completed.
iptables --policy INPUT DROP
iptables --policy OUTPUT DROP
iptables --policy FORWARD DROP
CHAINS=`iptables -n -L |perl -n -e /Chains+(S+)/ && !($1 =~ /^(INPUT|FORWARD|OUTPUT)$/) && print "$1 "`
echo Remove remaining chains:
echo $CHAINS
for chain in $CHAINS; do
iptables --flush $chain
done
# 2nd step cause of dependencies
for chain in $CHAINS; do
iptables --delete-chain $chain
done
for net in $MASQ_NETS; do
# I delete all the rules so you can rerun the scripts without bloating
# your nat entries.
iptables -D POSTROUTING -t nat -s $MASQ_NETS -j MASQUERADE 2>/dev/null
iptables -A POSTROUTING -t nat -s $MASQ_NETS -j MASQUERADE || exit 1
done
iptables --policy FORWARD ACCEPT
# Create a target for logging and dropping packets
iptables --new LDROP 2>/dev/null
iptables -A LDROP --proto tcp -j LOG --log-level info
--log-prefix "TCP Drop "
iptables -A LDROP --proto udp -j LOG --log-level info
--log-prefix "UDP Drop "
iptables -A LDROP --proto icmp -j LOG --log-level info
--log-prefix "ICMP Drop "
iptables -A LDROP --proto gre -j LOG --log-level info
--log-prefix "GRE Drop "
iptables -A LDROP -f -j LOG --log-level emerg
--log-prefix "FRAG Drop "
iptables -A LDROP -j DROP
# Create a table for watching some accepting rules
iptables --new WATCH 2>/dev/null
iptables -A WATCH -m limit -j LOG --log-level warn --log-prefix "ACCEPT "
iptables -A WATCH -j ACCEPT
echo Special target for local addresses:
iptables --new LOCAL 2>/dev/null
echo $LOCAL_ADDRS
for ip in $LOCAL_ADDRS; do
iptables -A INPUT --dst $ip -j LOCAL
# iptables -A INPUT --src $ip -i ! lo -j LDROP # lame spoof protect
done
echo Authorize mail from mail relay.
iptables -A LOCAL --proto tcp --syn --src $MAIL_RELAY --dst $EXT_IP --dport 25 -j ACCEPT
echo Authorizing samba access to:
echo $SMB_ACCESS
iptables --new SMB 2>/dev/null
for ip in $SMB_ACCESS; do
iptables -A SMB -s $ip -j ACCEPT
done
iptables -A LOCAL --proto udp -i ! $EXT_IF --dport 135:139 -j SMB
iptables -A LOCAL --proto tcp -i ! $EXT_IF --dport 135:139 -j SMB
iptables -A LOCAL --proto tcp -i ! $EXT_IF --dport 445 -j SMB
iptables -A INPUT -i ! $EXT_IF --dst $SMB_BCAST -j ACCEPT #lame samba broadcast
echo Drop and log every other incoming tcp connection attempts.
iptables -A LOCAL -i ! lo --proto tcp --syn --j LDROP
echo Authorize dns access for local nets.
for net in $MASQ_NETS 127.0.0.0/8; do
iptables -A INPUT --proto udp --src $net --dport 53 -j ACCEPT
done
echo Enforcing up ICMP policies, use iptables -L ICMP to check.
# If you deny all ICMP messages you head for trouble since it would
# break lots of tcp/ip algorythm (acz)
iptables --new ICMP 2>/dev/null
iptables -A INPUT --proto icmp -j ICMP
iptables -A ICMP -p icmp --icmp-type echo-reply -j ACCEPT
iptables -A ICMP -p icmp --icmp-type destination-unreachable -j WATCH
iptables -A ICMP -p icmp --icmp-type network-unreachable -j WATCH
iptables -A ICMP -p icmp --icmp-type host-unreachable -j WATCH
iptables -A ICMP -p icmp --icmp-type protocol-unreachable -j WATCH
iptables -A ICMP -p icmp --icmp-type port-unreachable -j ACCEPT
iptables -A ICMP -p icmp --icmp-type fragmentation-needed -j LDROP
iptables -A ICMP -p icmp --icmp-type source-route-failed -j WATCH
iptables -A ICMP -p icmp --icmp-type network-unknown -j WATCH
iptables -A ICMP -p icmp --icmp-type host-unknown -j WATCH
iptables -A ICMP -p icmp --icmp-type network-prohibited -j WATCH
iptables -A ICMP -p icmp --icmp-type host-prohibited -j WATCH
iptables -A ICMP -p icmp --icmp-type TOS-network-unreachable -j WATCH
iptables -A ICMP -p icmp --icmp-type TOS-host-unreachable -j WATCH
iptables -A ICMP -p icmp --icmp-type communication-prohibited -j WATCH
iptables -A ICMP -p icmp --icmp-type host-precedence-violation -j LDROP
iptables -A ICMP -p icmp --icmp-type precedence-cutoff -j LDROP
iptables -A ICMP -p icmp --icmp-type source-quench -j LDROP
iptables -A ICMP -p icmp --icmp-type redirect -j LDROP
iptables -A ICMP -p icmp --icmp-type network-redirect -j LDROP
iptables -A ICMP -p icmp --icmp-type host-redirect -j LDROP
iptables -A ICMP -p icmp --icmp-type TOS-network-redirect -j LDROP
iptables -A ICMP -p icmp --icmp-type TOS-host-redirect -j LDROP
iptables -A ICMP -p icmp --icmp-type echo-request -j WATCH
iptables -A ICMP -p icmp --icmp-type router-advertisement -j LDROP
iptables -A ICMP -p icmp --icmp-type router-solicitation -j LDROP
iptables -A ICMP -p icmp --icmp-type time-exceeded -j WATCH
iptables -A ICMP -p icmp --icmp-type ttl-zero-during-transit -j WATCH
iptables -A ICMP -p icmp --icmp-type ttl-zero-during-reassembly -j WATCH
iptables -A ICMP -p icmp --icmp-type parameter-problem -j WATCH
iptables -A ICMP -p icmp --icmp-type ip-header-bad -j WATCH
iptables -A ICMP -p icmp --icmp-type required-option-missing -j WATCH
iptables -A ICMP -p icmp --icmp-type timestamp-request -j LDROP
iptables -A ICMP -p icmp --icmp-type timestamp-reply -j LDROP
iptables -A ICMP -p icmp --icmp-type address-mask-request -j LDROP
iptables -A ICMP -p icmp --icmp-type address-mask-reply -j LDROP
iptables -A ICMP -p icmp -j LDROP
echo Authorize tcp traffic.
iptables -A INPUT --proto tcp -j ACCEPT
echo Authorize packet output.
iptables --policy OUTPUT ACCEPT
#echo reject ident if you drop em you gotta wait for timeout
#iptables -I LOCAL --proto tcp --syn --dst $EXT_IP --dport 113 -j REJECT
echo Drop and log all udp below 1024.
iptables -A INPUT -i ! lo --proto udp --dport :1023 -j LDROP
echo Drop rpc dynamic udp port:
RPC_UDP=`rpcinfo -p localhost|perl -n -e /.*udps+(d+)s+/ && print $1,"n"|sort -u`
echo $RPC_UDP
for port in $RPC_UDP; do
iptables -A LOCAL -i ! lo --proto udp --dport $port -j LDROP
done
echo Authorize udp above 1024.
iptables -A INPUT --proto udp --dport 1024: -j ACCEPT
<<lessSample:
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
# Set up variables
EXT_IF="eth0"
INT_IF="eth1"
EXT_IP=24.x.x.x/32
INT_IP=192.168.0.1/32
EXT_NET=24.x.x.0/24
INT_NET=192.168.0.0/24
MASQ_NETS="192.168.0.0/24"
LOCAL_ADDRS="127.0.0.0/8 192.168.0.1/32 24.x.x.x/32"
MAIL_RELAY=24.x.x.x/32
SMB_ACCESS="192.168.0.2/32"
SMB_BCAST="192.168.0.255/32"
# Turn on IP forwarding
echo Turning on IP forwarding.
echo 1 > /proc/sys/net/ipv4/ip_forward
# Load the ip_tables module
echo Loading ip_tables module.
/sbin/modprobe ip_tables || exit 1
# I let the kernel dynamically load the other modules
echo Flush standard tables.
iptables --flush INPUT
iptables --flush OUTPUT
iptables --flush FORWARD
echo Deny everything until firewall setup is completed.
iptables --policy INPUT DROP
iptables --policy OUTPUT DROP
iptables --policy FORWARD DROP
CHAINS=`iptables -n -L |perl -n -e /Chains+(S+)/ && !($1 =~ /^(INPUT|FORWARD|OUTPUT)$/) && print "$1 "`
echo Remove remaining chains:
echo $CHAINS
for chain in $CHAINS; do
iptables --flush $chain
done
# 2nd step cause of dependencies
for chain in $CHAINS; do
iptables --delete-chain $chain
done
for net in $MASQ_NETS; do
# I delete all the rules so you can rerun the scripts without bloating
# your nat entries.
iptables -D POSTROUTING -t nat -s $MASQ_NETS -j MASQUERADE 2>/dev/null
iptables -A POSTROUTING -t nat -s $MASQ_NETS -j MASQUERADE || exit 1
done
iptables --policy FORWARD ACCEPT
# Create a target for logging and dropping packets
iptables --new LDROP 2>/dev/null
iptables -A LDROP --proto tcp -j LOG --log-level info
--log-prefix "TCP Drop "
iptables -A LDROP --proto udp -j LOG --log-level info
--log-prefix "UDP Drop "
iptables -A LDROP --proto icmp -j LOG --log-level info
--log-prefix "ICMP Drop "
iptables -A LDROP --proto gre -j LOG --log-level info
--log-prefix "GRE Drop "
iptables -A LDROP -f -j LOG --log-level emerg
--log-prefix "FRAG Drop "
iptables -A LDROP -j DROP
# Create a table for watching some accepting rules
iptables --new WATCH 2>/dev/null
iptables -A WATCH -m limit -j LOG --log-level warn --log-prefix "ACCEPT "
iptables -A WATCH -j ACCEPT
echo Special target for local addresses:
iptables --new LOCAL 2>/dev/null
echo $LOCAL_ADDRS
for ip in $LOCAL_ADDRS; do
iptables -A INPUT --dst $ip -j LOCAL
# iptables -A INPUT --src $ip -i ! lo -j LDROP # lame spoof protect
done
echo Authorize mail from mail relay.
iptables -A LOCAL --proto tcp --syn --src $MAIL_RELAY --dst $EXT_IP --dport 25 -j ACCEPT
echo Authorizing samba access to:
echo $SMB_ACCESS
iptables --new SMB 2>/dev/null
for ip in $SMB_ACCESS; do
iptables -A SMB -s $ip -j ACCEPT
done
iptables -A LOCAL --proto udp -i ! $EXT_IF --dport 135:139 -j SMB
iptables -A LOCAL --proto tcp -i ! $EXT_IF --dport 135:139 -j SMB
iptables -A LOCAL --proto tcp -i ! $EXT_IF --dport 445 -j SMB
iptables -A INPUT -i ! $EXT_IF --dst $SMB_BCAST -j ACCEPT #lame samba broadcast
echo Drop and log every other incoming tcp connection attempts.
iptables -A LOCAL -i ! lo --proto tcp --syn --j LDROP
echo Authorize dns access for local nets.
for net in $MASQ_NETS 127.0.0.0/8; do
iptables -A INPUT --proto udp --src $net --dport 53 -j ACCEPT
done
echo Enforcing up ICMP policies, use iptables -L ICMP to check.
# If you deny all ICMP messages you head for trouble since it would
# break lots of tcp/ip algorythm (acz)
iptables --new ICMP 2>/dev/null
iptables -A INPUT --proto icmp -j ICMP
iptables -A ICMP -p icmp --icmp-type echo-reply -j ACCEPT
iptables -A ICMP -p icmp --icmp-type destination-unreachable -j WATCH
iptables -A ICMP -p icmp --icmp-type network-unreachable -j WATCH
iptables -A ICMP -p icmp --icmp-type host-unreachable -j WATCH
iptables -A ICMP -p icmp --icmp-type protocol-unreachable -j WATCH
iptables -A ICMP -p icmp --icmp-type port-unreachable -j ACCEPT
iptables -A ICMP -p icmp --icmp-type fragmentation-needed -j LDROP
iptables -A ICMP -p icmp --icmp-type source-route-failed -j WATCH
iptables -A ICMP -p icmp --icmp-type network-unknown -j WATCH
iptables -A ICMP -p icmp --icmp-type host-unknown -j WATCH
iptables -A ICMP -p icmp --icmp-type network-prohibited -j WATCH
iptables -A ICMP -p icmp --icmp-type host-prohibited -j WATCH
iptables -A ICMP -p icmp --icmp-type TOS-network-unreachable -j WATCH
iptables -A ICMP -p icmp --icmp-type TOS-host-unreachable -j WATCH
iptables -A ICMP -p icmp --icmp-type communication-prohibited -j WATCH
iptables -A ICMP -p icmp --icmp-type host-precedence-violation -j LDROP
iptables -A ICMP -p icmp --icmp-type precedence-cutoff -j LDROP
iptables -A ICMP -p icmp --icmp-type source-quench -j LDROP
iptables -A ICMP -p icmp --icmp-type redirect -j LDROP
iptables -A ICMP -p icmp --icmp-type network-redirect -j LDROP
iptables -A ICMP -p icmp --icmp-type host-redirect -j LDROP
iptables -A ICMP -p icmp --icmp-type TOS-network-redirect -j LDROP
iptables -A ICMP -p icmp --icmp-type TOS-host-redirect -j LDROP
iptables -A ICMP -p icmp --icmp-type echo-request -j WATCH
iptables -A ICMP -p icmp --icmp-type router-advertisement -j LDROP
iptables -A ICMP -p icmp --icmp-type router-solicitation -j LDROP
iptables -A ICMP -p icmp --icmp-type time-exceeded -j WATCH
iptables -A ICMP -p icmp --icmp-type ttl-zero-during-transit -j WATCH
iptables -A ICMP -p icmp --icmp-type ttl-zero-during-reassembly -j WATCH
iptables -A ICMP -p icmp --icmp-type parameter-problem -j WATCH
iptables -A ICMP -p icmp --icmp-type ip-header-bad -j WATCH
iptables -A ICMP -p icmp --icmp-type required-option-missing -j WATCH
iptables -A ICMP -p icmp --icmp-type timestamp-request -j LDROP
iptables -A ICMP -p icmp --icmp-type timestamp-reply -j LDROP
iptables -A ICMP -p icmp --icmp-type address-mask-request -j LDROP
iptables -A ICMP -p icmp --icmp-type address-mask-reply -j LDROP
iptables -A ICMP -p icmp -j LDROP
echo Authorize tcp traffic.
iptables -A INPUT --proto tcp -j ACCEPT
echo Authorize packet output.
iptables --policy OUTPUT ACCEPT
#echo reject ident if you drop em you gotta wait for timeout
#iptables -I LOCAL --proto tcp --syn --dst $EXT_IP --dport 113 -j REJECT
echo Drop and log all udp below 1024.
iptables -A INPUT -i ! lo --proto udp --dport :1023 -j LDROP
echo Drop rpc dynamic udp port:
RPC_UDP=`rpcinfo -p localhost|perl -n -e /.*udps+(d+)s+/ && print $1,"n"|sort -u`
echo $RPC_UDP
for port in $RPC_UDP; do
iptables -A LOCAL -i ! lo --proto udp --dport $port -j LDROP
done
echo Authorize udp above 1024.
iptables -A INPUT --proto udp --dport 1024: -j ACCEPT
Download (MB)
Added: 2007-02-14 License: GPL (GNU General Public License) Price:
984 downloads
Icmpenum 1.0
Icmpenum sends ICMP traffic for host enumeration. more>>
Host enumeration is the act of determining the IP address of potential targets on a network. This can be done in both layer 2 and layer 3. Icmpenum project can send ICMP traffic for such enumeration.
The ICMP packets supported are: Echo, Timestamp, Information and Netmask. Furthermore, it supports spoofing and promiscuous listening for reply packets. Icmpenum is great for enumerating networks which allow ICMP traffic.
<<lessThe ICMP packets supported are: Echo, Timestamp, Information and Netmask. Furthermore, it supports spoofing and promiscuous listening for reply packets. Icmpenum is great for enumerating networks which allow ICMP traffic.
Download (0.58MB)
Added: 2007-05-08 License: GPL (GNU General Public License) Price:
548 downloads
ICMPScan 1.1
ICMPScan scans the specified address, or addresses, for ICMP responses. more>>
ICMPScan scans the specified address, or addresses, for ICMP responses.
Usage:
icmpscan [ -EPTSNMAIRcvbn ] [ -A address ] [ -f filename ] [ -i interface ] [ -r retries ] [ -t timeout ] target [...]
Options:
-i, --interface
Listen on the specified interface. If unspecified, icmpscan will examine the routing table and select the most appropriate interface for each target address.
-c, --promisc
Put in interface into promiscuous mode. As this option increases the load on the system in general, it should only be used if spoofing of source packets address is enabled with the "-A" option.
-A, --address
Specify the source IP address of generated packets.
-t, --timeout
Specify the timeout, in milli-seconds, before retrying.
-r, --retries
Specify the number of attempts to elicit a particular ICMP response.
-f, --file
Read target list from the specified file.
-E, -P, --echo, --ping
Check of ICMP Echo responses.
-T, -S, --timestamp
Check for ICMP Timestamp responses.
-N, -M, --netmask
Check for ICMP Netmask responses.
-I, --info
Check for ICMP Info responses.
-R, --router
Check for ICMP Router Solicitation responses.
-v, --verbose
Increase the output verbosity.
-B, --debug
Target Specification
The simplest case is listing single hostnames or IP addresses on the command line. If you want to scan a subnet of IP addresses, you can append /mask to the hostname or IP address. mask must be between 0 (scan the whole Internet) and 32 (scan the single host specified). Use /24 to scan a class "C" address and /16 for a class "B". There is also a more powerful notation which lets you specify an IP address using lists/ranges for each element. Thus you can scan the whole class "B" network 192.168.*.* by specifying "192.168.*.*" or "192.168.0-255.0-255" or even "192.168.1-50,51-255.1,2,3,4,5-255". And of course you can use the mask notation: "192.168.0.0/16". These are all equivalent. If you use asterisks ("*"), remember that most shells require you to escape them with back slashes or protect them with quotes.
Examples:
The following example checks the first 16 addresses in the 192.168.1.0/24 netblock for all ICMP responses. The scan speed is increased by lowering the timeout value and setting the number of retries to 1:
> icmpscan -t 500 -r 1 192.168.1.0-16
192.168.1.0: Echo (From 192.168.1.17!)
192.168.1.0: Address Mask [255.255.255.0] (From 192.168.1.17!)
192.168.1.7: Echo
192.168.1.7: Timestamp [0x03ab2db0, 0x02d4c507, 0x02d4c507]
192.168.1.7: Address Mask [255.255.255.0]
192.168.1.8: Echo
192.168.1.8: Address Mask [255.255.255.0]
To display failed probes, increase the output verbosity:
> icmpscan -v 192.168.1.1
192.168.1.1: -- No response to Echo request --
192.168.1.1: -- No response to Timestamp request --
192.168.1.1: -- No response to Netmask request --
192.168.1.1: -- No response to Info request --
192.168.1.1: -- No response to Router Solicitation request --
Individual ICMP types can be checked for by listing their corresponding flags on the command line:
> icmpscan -v --echo --netmask 192.168.1.7
192.168.1.7: Echo
192.168.1.7: Address Mask [255.255.255.0]
<<lessUsage:
icmpscan [ -EPTSNMAIRcvbn ] [ -A address ] [ -f filename ] [ -i interface ] [ -r retries ] [ -t timeout ] target [...]
Options:
-i, --interface
Listen on the specified interface. If unspecified, icmpscan will examine the routing table and select the most appropriate interface for each target address.
-c, --promisc
Put in interface into promiscuous mode. As this option increases the load on the system in general, it should only be used if spoofing of source packets address is enabled with the "-A" option.
-A, --address
Specify the source IP address of generated packets.
-t, --timeout
Specify the timeout, in milli-seconds, before retrying.
-r, --retries
Specify the number of attempts to elicit a particular ICMP response.
-f, --file
Read target list from the specified file.
-E, -P, --echo, --ping
Check of ICMP Echo responses.
-T, -S, --timestamp
Check for ICMP Timestamp responses.
-N, -M, --netmask
Check for ICMP Netmask responses.
-I, --info
Check for ICMP Info responses.
-R, --router
Check for ICMP Router Solicitation responses.
-v, --verbose
Increase the output verbosity.
-B, --debug
Target Specification
The simplest case is listing single hostnames or IP addresses on the command line. If you want to scan a subnet of IP addresses, you can append /mask to the hostname or IP address. mask must be between 0 (scan the whole Internet) and 32 (scan the single host specified). Use /24 to scan a class "C" address and /16 for a class "B". There is also a more powerful notation which lets you specify an IP address using lists/ranges for each element. Thus you can scan the whole class "B" network 192.168.*.* by specifying "192.168.*.*" or "192.168.0-255.0-255" or even "192.168.1-50,51-255.1,2,3,4,5-255". And of course you can use the mask notation: "192.168.0.0/16". These are all equivalent. If you use asterisks ("*"), remember that most shells require you to escape them with back slashes or protect them with quotes.
Examples:
The following example checks the first 16 addresses in the 192.168.1.0/24 netblock for all ICMP responses. The scan speed is increased by lowering the timeout value and setting the number of retries to 1:
> icmpscan -t 500 -r 1 192.168.1.0-16
192.168.1.0: Echo (From 192.168.1.17!)
192.168.1.0: Address Mask [255.255.255.0] (From 192.168.1.17!)
192.168.1.7: Echo
192.168.1.7: Timestamp [0x03ab2db0, 0x02d4c507, 0x02d4c507]
192.168.1.7: Address Mask [255.255.255.0]
192.168.1.8: Echo
192.168.1.8: Address Mask [255.255.255.0]
To display failed probes, increase the output verbosity:
> icmpscan -v 192.168.1.1
192.168.1.1: -- No response to Echo request --
192.168.1.1: -- No response to Timestamp request --
192.168.1.1: -- No response to Netmask request --
192.168.1.1: -- No response to Info request --
192.168.1.1: -- No response to Router Solicitation request --
Individual ICMP types can be checked for by listing their corresponding flags on the command line:
> icmpscan -v --echo --netmask 192.168.1.7
192.168.1.7: Echo
192.168.1.7: Address Mask [255.255.255.0]
Download (0.044MB)
Added: 2007-08-22 License: GPL (GNU General Public License) Price:
794 downloads
Icmpenun 1.2
Icmpenum sends ICMP traffic to potential targets on a network. more>>
Icmpenum sends ICMP traffic to potential targets on a network.
Introduction:
Host enumeration is the act of determining the IP address of potential targets on a network. This can be done in both layer 2 and layer 3. Icmpenum sends ICMP traffic for such enumeration. The ICMP packets supported are: Echo, Timestamp, Information and Netmask. Furthermore, it supports spoofing and promiscuous listening for reply packets. Icmpenum is great for enumerating networks which allow ICMP traffic.
Installation:
1. Install the latest libpcap (libpcap 0.4, ftp://ftp.ee.lbl.gov/libpcap.tar.Z).
2. Install the latest Libnet (http://www.packetfactory.net/libnet/).
3. Compile icmpenum as follows:
gcc `libnet-config --defines` -o icmpenum icmpenum.c -lnet -lpcap
4. Copy icmpenum to your fave directory and (as root) start enumerating.
Usage:
Running icmpenum -h gives you the following screen:
# ./icmpenum -h
USAGE: ./icmpenum [opts] [-c class C] [-d dev] [-i 1-3] [-s src] [-t sec] hosts
opts are h n p r v
-h this help screen
-n no sending of packets
-p promiscuous receive mode
-r receiving packets only (no
-v verbose
-c class C in x.x.x.0 form
-i icmp type to send/receive, types include the following:
1 echo/echo reply (default)
2 timestamp request/reply
3 info request/reply
-d device to grab local IP or sniff from, default is eth0
-s spoofed source address
-t time in seconds to wait for all replies (default 5)
host(s) are target hosts (ignored if using -c)
Examples:
Here are some example uses of icmpenum to enumerate hosts.
Example 1:
[Host1]# icmpenum 192.168.1.1 192.168.1.2
This will use the default of Echo packets to try and determine if
192.168.1.1 and 192.168.1.2 are up and running.
Example 2:
[Host1]# icmpenum -i 2 -v 192.168.100.100 192.168.100.200
This will enumerate the two hosts using Timestamp packets in
verbose mode.
Example 3:
[Host1]# icmpenum -i 3 -s 10.10.10.10 -p -v 192.168.1.1 192.168.1.2
This will enumerate hosts 192.168.1.1 and 192.168.1.2 using
Information packets with a spoofed address of 10.10.10.10, since our real address is 10.10.10.11 we use the -p option to listen for the replies.
Here are some more advanced uses of icmpenum.
Example 4:
Assuming Host1 is 6.6.6.6 and Host2 is 7.7.7.7, and that the network 1.1.1.0 has potential hosts to enumerate, we use the following two entries to enumerate with Information packets:
[Host2]# icmpenum -r -t 30 -i 3 -c 1.1.1.0
[Host1]# icmpenum -s 7.7.7.7 -i 3 -c 1.1.1.0
Host2 starts first in receive mode with a timeout of 30 seconds and starts listening for Information packets from the 1.1.1.0 network. Then Host1 starts sending spoofed packets with Host2 as the source address, sending exactly what Host2 is listening for. It should be noted that this is hardly stealthy, as logs at 1.1.1s site could have 7.7.7.7s address all over them, but the -r function is good for testing.
Example 5:
Assuming Host1 is 6.6.6.6 and Host2 is 7.7.7.7, and that Host2 can sniff traffic between 1.1.1.0 and 2.2.2.0, we use the following entries to enumerate the 1.1.1.0 network:
[Host2]# icmpenum -t 20 -n -p -i 2 -c 1.1.1.0
[Host1]# icmpenum -s 2.2.2.2 -i 2 -c 1.1.1.0
Host2 starts first with a timeout of 20 seconds, makes sure not to send the packets with the -n option, listens promiscuously for Timestamp packets from the 1.1.1.0 network. Host1 sends the exact packets Host2 is listening for with a 2.2.2.2 spoofed source address. Yes, one could simply replace the -n option in Host2s command line with -s 2.2.2.2 and do the same thing from one workstation, but were demonstrating a distributed concept.
Enhancements:
- I have added ICMP MASK (type 17 and 18) requests and replys. Simply use the -i 4 option on the command line, such as; icmpenum -i 4 -c 1.2.3.1 (sends ICMP MASK requests to the Class C range 1.2.3.1/24 and reports any system as.
- Due to the use of some older versions of Libnet and Libpcap. I can see problems for some people compiling this and hence have placed two statically linked versions within the tarball
<<lessIntroduction:
Host enumeration is the act of determining the IP address of potential targets on a network. This can be done in both layer 2 and layer 3. Icmpenum sends ICMP traffic for such enumeration. The ICMP packets supported are: Echo, Timestamp, Information and Netmask. Furthermore, it supports spoofing and promiscuous listening for reply packets. Icmpenum is great for enumerating networks which allow ICMP traffic.
Installation:
1. Install the latest libpcap (libpcap 0.4, ftp://ftp.ee.lbl.gov/libpcap.tar.Z).
2. Install the latest Libnet (http://www.packetfactory.net/libnet/).
3. Compile icmpenum as follows:
gcc `libnet-config --defines` -o icmpenum icmpenum.c -lnet -lpcap
4. Copy icmpenum to your fave directory and (as root) start enumerating.
Usage:
Running icmpenum -h gives you the following screen:
# ./icmpenum -h
USAGE: ./icmpenum [opts] [-c class C] [-d dev] [-i 1-3] [-s src] [-t sec] hosts
opts are h n p r v
-h this help screen
-n no sending of packets
-p promiscuous receive mode
-r receiving packets only (no
-v verbose
-c class C in x.x.x.0 form
-i icmp type to send/receive, types include the following:
1 echo/echo reply (default)
2 timestamp request/reply
3 info request/reply
-d device to grab local IP or sniff from, default is eth0
-s spoofed source address
-t time in seconds to wait for all replies (default 5)
host(s) are target hosts (ignored if using -c)
Examples:
Here are some example uses of icmpenum to enumerate hosts.
Example 1:
[Host1]# icmpenum 192.168.1.1 192.168.1.2
This will use the default of Echo packets to try and determine if
192.168.1.1 and 192.168.1.2 are up and running.
Example 2:
[Host1]# icmpenum -i 2 -v 192.168.100.100 192.168.100.200
This will enumerate the two hosts using Timestamp packets in
verbose mode.
Example 3:
[Host1]# icmpenum -i 3 -s 10.10.10.10 -p -v 192.168.1.1 192.168.1.2
This will enumerate hosts 192.168.1.1 and 192.168.1.2 using
Information packets with a spoofed address of 10.10.10.10, since our real address is 10.10.10.11 we use the -p option to listen for the replies.
Here are some more advanced uses of icmpenum.
Example 4:
Assuming Host1 is 6.6.6.6 and Host2 is 7.7.7.7, and that the network 1.1.1.0 has potential hosts to enumerate, we use the following two entries to enumerate with Information packets:
[Host2]# icmpenum -r -t 30 -i 3 -c 1.1.1.0
[Host1]# icmpenum -s 7.7.7.7 -i 3 -c 1.1.1.0
Host2 starts first in receive mode with a timeout of 30 seconds and starts listening for Information packets from the 1.1.1.0 network. Then Host1 starts sending spoofed packets with Host2 as the source address, sending exactly what Host2 is listening for. It should be noted that this is hardly stealthy, as logs at 1.1.1s site could have 7.7.7.7s address all over them, but the -r function is good for testing.
Example 5:
Assuming Host1 is 6.6.6.6 and Host2 is 7.7.7.7, and that Host2 can sniff traffic between 1.1.1.0 and 2.2.2.0, we use the following entries to enumerate the 1.1.1.0 network:
[Host2]# icmpenum -t 20 -n -p -i 2 -c 1.1.1.0
[Host1]# icmpenum -s 2.2.2.2 -i 2 -c 1.1.1.0
Host2 starts first with a timeout of 20 seconds, makes sure not to send the packets with the -n option, listens promiscuously for Timestamp packets from the 1.1.1.0 network. Host1 sends the exact packets Host2 is listening for with a 2.2.2.2 spoofed source address. Yes, one could simply replace the -n option in Host2s command line with -s 2.2.2.2 and do the same thing from one workstation, but were demonstrating a distributed concept.
Enhancements:
- I have added ICMP MASK (type 17 and 18) requests and replys. Simply use the -i 4 option on the command line, such as; icmpenum -i 4 -c 1.2.3.1 (sends ICMP MASK requests to the Class C range 1.2.3.1/24 and reports any system as.
- Due to the use of some older versions of Libnet and Libpcap. I can see problems for some people compiling this and hence have placed two statically linked versions within the tarball
Download (0.58MB)
Added: 2007-04-05 License: GPL (GNU General Public License) Price:
556 downloads
ICMPInfo 0.2
ICMPInfo is a tool that uses ICMP type 13 and 17 to retrieve the current time of a remote host and its netmask. more>>
ICMPInfo is a tool that uses ICMP type 13 and 17 to retrieve the current time of a remote host and its netmask.
<<less Download (0.017MB)
Added: 2006-04-18 License: GPL (GNU General Public License) Price:
1284 downloads
NetPacket::ICMP 0.04
NetPacket::ICMP is a Perl module to assemble and disassemble ICMP (Internet Control Message Protocol) packets. more>>
NetPacket::ICMP is a Perl module to assemble and disassemble ICMP (Internet Control Message Protocol) packets.
SYNOPSIS
use NetPacket::ICMP;
$icmp_obj = NetPacket::ICMP->decode($raw_pkt);
$icmp_pkt = NetPacket::ICMP->encode();
$icmp_data = NetPacket::ICMP::strip($raw_pkt);
NetPacket::ICMP provides a set of routines for assembling and disassembling packets using ICMP (Internet Control Message Protocol).
Methods
NetPacket::ICMP->decode([RAW PACKET])
Decode the raw packet data given and return an object containing instance data. This method will quite happily decode garbage input. It is the responsibility of the programmer to ensure valid packet data is passed to this method.
NetPacket::ICMP->encode()
Return an ICMP packet encoded with the instance data specified.
<<lessSYNOPSIS
use NetPacket::ICMP;
$icmp_obj = NetPacket::ICMP->decode($raw_pkt);
$icmp_pkt = NetPacket::ICMP->encode();
$icmp_data = NetPacket::ICMP::strip($raw_pkt);
NetPacket::ICMP provides a set of routines for assembling and disassembling packets using ICMP (Internet Control Message Protocol).
Methods
NetPacket::ICMP->decode([RAW PACKET])
Decode the raw packet data given and return an object containing instance data. This method will quite happily decode garbage input. It is the responsibility of the programmer to ensure valid packet data is passed to this method.
NetPacket::ICMP->encode()
Return an ICMP packet encoded with the instance data specified.
Download (0.011MB)
Added: 2007-02-27 License: Perl Artistic License Price:
970 downloads
ATA over Ethernet Tools 16
The ATA over Ethernet Tools are intended for use in conjunction with an ATA over Ethernet (AoE) driver for a Linux 2.6 kernel. more>>
ATA over Ethernet Tools are intended for use in conjunction with an ATA over Ethernet (AoE) driver for a Linux 2.6 kernel.
They perform simple tasks like listing available devices, triggering device discovery, and restricting the network interfaces on which AoE is performed.
Whats New in This Release:
This release includes a workaround for a bug in the dash shell where dash does not support POSIX math expressions like ...
n=1
echo $((n+1))
<<lessThey perform simple tasks like listing available devices, triggering device discovery, and restricting the network interfaces on which AoE is performed.
Whats New in This Release:
This release includes a workaround for a bug in the dash shell where dash does not support POSIX math expressions like ...
n=1
echo $((n+1))
Download (0.019MB)
Added: 2007-06-02 License: GPL (GNU General Public License) Price:
878 downloads
UTIN Firewall script
UTIN Firewall script project is a script for Linux 2.4.x and iptables. more>>
UTIN Firewall script project is a script for Linux 2.4.x and iptables.
###########
# Configuration options, these will speed you up getting this script to
# work with your own setup.
#
# your LANs IP range and localhost IP. /24 means to only use the first 24
# bits of the 32 bit IP adress. the same as netmask 255.255.255.0
#
# INET_IP is used by me to allow myself to do anything to myself, might
# be a security risc but sometimes I want this. If you dont have a static
# IP, I suggest not using this option at all for now but its still
# enabled per default and will add some really nifty security bugs for all
# those who skips reading the documentation=)
LAN_IP="192.168.0.2"
LAN_BCAST_ADRESS="192.168.0.255"
LAN_IFACE="eth1"
LO_IFACE="lo"
LO_IP="127.0.0.1"
INET_IP="194.236.50.155"
INET_IFACE="eth0"
IPTABLES="/usr/local/sbin/iptables"
#########
# Load all required IPTables modules
#
#
# Needed to initially load modules
#
/sbin/depmod -a
#
# Adds some iptables targets like LOG, REJECT and MASQUARADE.
#
/sbin/modprobe ipt_LOG
#/sbin/modprobe ipt_REJECT
/sbin/modprobe ipt_MASQUERADE
#
# Support for owner matching
#
#/sbin/modprobe ipt_owner
#
# Support for connection tracking of FTP and IRC.
#
#/sbin/modprobe ip_conntrack_ftp
#/sbin/modprobe ip_conntrack_irc
#
# Enable ip_forward, this is critical since it is turned off as defaul in
# Linux.
#
echo "1" > /proc/sys/net/ipv4/ip_forward
#
# Dynamic IP users:
#
#echo "1" > /proc/sys/net/ipv4/ip_dynaddr
#
# Enable simple IP Forwarding and Network Address Translation
#
$IPTABLES -t nat -A POSTROUTING -o $INET_IFACE -j SNAT --to-source $INET_IP
#
# Set default policies for the INPUT, FORWARD and OUTPUT chains
#
$IPTABLES -P INPUT DROP
$IPTABLES -P OUTPUT DROP
$IPTABLES -P FORWARD DROP
#
# bad_tcp_packets chain
#
# Take care of bad TCP packets that we dont want.
#
$IPTABLES -N bad_tcp_packets
$IPTABLES -A bad_tcp_packets -p tcp ! --syn -m state --state NEW -j LOG
--log-prefix "New not syn:"
$IPTABLES -A bad_tcp_packets -p tcp ! --syn -m state --state NEW -j DROP
#
# Do some checks for obviously spoofed IPs
#
$IPTABLES -A bad_tcp_packets -i $INET_IFACE -s 192.168.0.0/16 -j DROP
$IPTABLES -A bad_tcp_packets -i $INET_IFACE -s 10.0.0.0/8 -j DROP
$IPTABLES -A bad_tcp_packets -i $INET_IFACE -s 172.16.0.0/12 -j DROP
$IPTABLES -A bad_tcp_packets -i $LAN_IFACE ! -s 192.168.0.0/16 -j DROP
#
# Bad TCP packets we dont want
#
$IPTABLES -A FORWARD -p tcp -j bad_tcp_packets
#
# Accept the packets we actually want to forward between interfaces.
#
$IPTABLES -A FORWARD -p tcp --dport 21 -i $LAN_IFACE -j ACCEPT
$IPTABLES -A FORWARD -p tcp --dport 80 -i $LAN_IFACE -j ACCEPT
$IPTABLES -A FORWARD -p tcp --dport 110 -i $LAN_IFACE -j ACCEPT
$IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
$IPTABLES -A FORWARD -m limit --limit 3/minute --limit-burst 3 -j LOG
--log-level DEBUG --log-prefix "IPT FORWARD packet died: "
#
# Create separate chains for ICMP, TCP and UDP to traverse
#
$IPTABLES -N icmp_packets
$IPTABLES -N tcp_packets
$IPTABLES -N udpincoming_packets
#
# The allowed chain for TCP connections
#
$IPTABLES -N allowed
$IPTABLES -A allowed -p TCP --syn -j ACCEPT
$IPTABLES -A allowed -p TCP -m state --state ESTABLISHED,RELATED
-j ACCEPT
$IPTABLES -A allowed -p TCP -j DROP
#
# ICMP rules
#
# Changed rules totally
$IPTABLES -A icmp_packets -p ICMP -s 0/0 --icmp-type 8 -j ACCEPT
$IPTABLES -A icmp_packets -p ICMP -s 0/0 --icmp-type 11 -j ACCEPT
#
# TCP rules
#
$IPTABLES -A tcp_packets -p TCP -s 0/0 --dport 21 -j allowed
$IPTABLES -A tcp_packets -p TCP -s 0/0 --dport 22 -j allowed
$IPTABLES -A tcp_packets -p TCP -s 0/0 --dport 80 -j allowed
$IPTABLES -A tcp_packets -p TCP -s 0/0 --dport 113 -j allowed
#
# UDP ports
#
$IPTABLES -A udpincoming_packets -p UDP -s 0/0 --source-port 53 -j ACCEPT
$IPTABLES -A udpincoming_packets -p UDP -s 0/0 --source-port 123 -j ACCEPT
$IPTABLES -A udpincoming_packets -p UDP -s 0/0 --source-port 2074 -j ACCEPT
$IPTABLES -A udpincoming_packets -p UDP -s 0/0 --source-port 4000 -j ACCEPT
#
# INPUT chain
#
# Bad TCP packets we dont want
#
$IPTABLES -A INPUT -p tcp -j bad_tcp_packets
#
# Rules for incoming packets from anywhere
#
$IPTABLES -A INPUT -p ICMP -j icmp_packets
$IPTABLES -A INPUT -p TCP -j tcp_packets
$IPTABLES -A INPUT -p UDP -j udpincoming_packets
#
# Rules for special networks not part of the Internet
#
$IPTABLES -A INPUT -p ALL -i $LO_IFACE -s $LO_IP -j ACCEPT
$IPTABLES -A INPUT -p ALL -i $LO_IFACE -s $LAN_IP -j ACCEPT
$IPTABLES -A INPUT -p ALL -i $LO_IFACE -s $INET_IP -j ACCEPT
$IPTABLES -A INPUT -p ALL -d $INET_IP -m state --state ESTABLISHED,RELATED
-j ACCEPT
$IPTABLES -A INPUT -m limit --limit 3/minute --limit-burst 3
-j LOG --log-level DEBUG --log-prefix "IPT INPUT packet died: "
#
# OUTPUT chain
#
#
# Bad TCP packets we dont want
#
$IPTABLES -A OUTPUT -p tcp -j bad_tcp_packets
$IPTABLES -A OUTPUT -p ALL -s $LO_IP -j ACCEPT
$IPTABLES -A OUTPUT -p ALL -s $LAN_IP -j ACCEPT
$IPTABLES -A OUTPUT -p ALL -s $INET_IP -j ACCEPT
$IPTABLES -A OUTPUT -m limit --limit 3/minute --limit-burst 3
-j LOG --log-level DEBUG --log-prefix "IPT OUTPUT packet died: "
<<less###########
# Configuration options, these will speed you up getting this script to
# work with your own setup.
#
# your LANs IP range and localhost IP. /24 means to only use the first 24
# bits of the 32 bit IP adress. the same as netmask 255.255.255.0
#
# INET_IP is used by me to allow myself to do anything to myself, might
# be a security risc but sometimes I want this. If you dont have a static
# IP, I suggest not using this option at all for now but its still
# enabled per default and will add some really nifty security bugs for all
# those who skips reading the documentation=)
LAN_IP="192.168.0.2"
LAN_BCAST_ADRESS="192.168.0.255"
LAN_IFACE="eth1"
LO_IFACE="lo"
LO_IP="127.0.0.1"
INET_IP="194.236.50.155"
INET_IFACE="eth0"
IPTABLES="/usr/local/sbin/iptables"
#########
# Load all required IPTables modules
#
#
# Needed to initially load modules
#
/sbin/depmod -a
#
# Adds some iptables targets like LOG, REJECT and MASQUARADE.
#
/sbin/modprobe ipt_LOG
#/sbin/modprobe ipt_REJECT
/sbin/modprobe ipt_MASQUERADE
#
# Support for owner matching
#
#/sbin/modprobe ipt_owner
#
# Support for connection tracking of FTP and IRC.
#
#/sbin/modprobe ip_conntrack_ftp
#/sbin/modprobe ip_conntrack_irc
#
# Enable ip_forward, this is critical since it is turned off as defaul in
# Linux.
#
echo "1" > /proc/sys/net/ipv4/ip_forward
#
# Dynamic IP users:
#
#echo "1" > /proc/sys/net/ipv4/ip_dynaddr
#
# Enable simple IP Forwarding and Network Address Translation
#
$IPTABLES -t nat -A POSTROUTING -o $INET_IFACE -j SNAT --to-source $INET_IP
#
# Set default policies for the INPUT, FORWARD and OUTPUT chains
#
$IPTABLES -P INPUT DROP
$IPTABLES -P OUTPUT DROP
$IPTABLES -P FORWARD DROP
#
# bad_tcp_packets chain
#
# Take care of bad TCP packets that we dont want.
#
$IPTABLES -N bad_tcp_packets
$IPTABLES -A bad_tcp_packets -p tcp ! --syn -m state --state NEW -j LOG
--log-prefix "New not syn:"
$IPTABLES -A bad_tcp_packets -p tcp ! --syn -m state --state NEW -j DROP
#
# Do some checks for obviously spoofed IPs
#
$IPTABLES -A bad_tcp_packets -i $INET_IFACE -s 192.168.0.0/16 -j DROP
$IPTABLES -A bad_tcp_packets -i $INET_IFACE -s 10.0.0.0/8 -j DROP
$IPTABLES -A bad_tcp_packets -i $INET_IFACE -s 172.16.0.0/12 -j DROP
$IPTABLES -A bad_tcp_packets -i $LAN_IFACE ! -s 192.168.0.0/16 -j DROP
#
# Bad TCP packets we dont want
#
$IPTABLES -A FORWARD -p tcp -j bad_tcp_packets
#
# Accept the packets we actually want to forward between interfaces.
#
$IPTABLES -A FORWARD -p tcp --dport 21 -i $LAN_IFACE -j ACCEPT
$IPTABLES -A FORWARD -p tcp --dport 80 -i $LAN_IFACE -j ACCEPT
$IPTABLES -A FORWARD -p tcp --dport 110 -i $LAN_IFACE -j ACCEPT
$IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
$IPTABLES -A FORWARD -m limit --limit 3/minute --limit-burst 3 -j LOG
--log-level DEBUG --log-prefix "IPT FORWARD packet died: "
#
# Create separate chains for ICMP, TCP and UDP to traverse
#
$IPTABLES -N icmp_packets
$IPTABLES -N tcp_packets
$IPTABLES -N udpincoming_packets
#
# The allowed chain for TCP connections
#
$IPTABLES -N allowed
$IPTABLES -A allowed -p TCP --syn -j ACCEPT
$IPTABLES -A allowed -p TCP -m state --state ESTABLISHED,RELATED
-j ACCEPT
$IPTABLES -A allowed -p TCP -j DROP
#
# ICMP rules
#
# Changed rules totally
$IPTABLES -A icmp_packets -p ICMP -s 0/0 --icmp-type 8 -j ACCEPT
$IPTABLES -A icmp_packets -p ICMP -s 0/0 --icmp-type 11 -j ACCEPT
#
# TCP rules
#
$IPTABLES -A tcp_packets -p TCP -s 0/0 --dport 21 -j allowed
$IPTABLES -A tcp_packets -p TCP -s 0/0 --dport 22 -j allowed
$IPTABLES -A tcp_packets -p TCP -s 0/0 --dport 80 -j allowed
$IPTABLES -A tcp_packets -p TCP -s 0/0 --dport 113 -j allowed
#
# UDP ports
#
$IPTABLES -A udpincoming_packets -p UDP -s 0/0 --source-port 53 -j ACCEPT
$IPTABLES -A udpincoming_packets -p UDP -s 0/0 --source-port 123 -j ACCEPT
$IPTABLES -A udpincoming_packets -p UDP -s 0/0 --source-port 2074 -j ACCEPT
$IPTABLES -A udpincoming_packets -p UDP -s 0/0 --source-port 4000 -j ACCEPT
#
# INPUT chain
#
# Bad TCP packets we dont want
#
$IPTABLES -A INPUT -p tcp -j bad_tcp_packets
#
# Rules for incoming packets from anywhere
#
$IPTABLES -A INPUT -p ICMP -j icmp_packets
$IPTABLES -A INPUT -p TCP -j tcp_packets
$IPTABLES -A INPUT -p UDP -j udpincoming_packets
#
# Rules for special networks not part of the Internet
#
$IPTABLES -A INPUT -p ALL -i $LO_IFACE -s $LO_IP -j ACCEPT
$IPTABLES -A INPUT -p ALL -i $LO_IFACE -s $LAN_IP -j ACCEPT
$IPTABLES -A INPUT -p ALL -i $LO_IFACE -s $INET_IP -j ACCEPT
$IPTABLES -A INPUT -p ALL -d $INET_IP -m state --state ESTABLISHED,RELATED
-j ACCEPT
$IPTABLES -A INPUT -m limit --limit 3/minute --limit-burst 3
-j LOG --log-level DEBUG --log-prefix "IPT INPUT packet died: "
#
# OUTPUT chain
#
#
# Bad TCP packets we dont want
#
$IPTABLES -A OUTPUT -p tcp -j bad_tcp_packets
$IPTABLES -A OUTPUT -p ALL -s $LO_IP -j ACCEPT
$IPTABLES -A OUTPUT -p ALL -s $LAN_IP -j ACCEPT
$IPTABLES -A OUTPUT -p ALL -s $INET_IP -j ACCEPT
$IPTABLES -A OUTPUT -m limit --limit 3/minute --limit-burst 3
-j LOG --log-level DEBUG --log-prefix "IPT OUTPUT packet died: "
Download (MB)
Added: 2007-02-13 License: GPL (GNU General Public License) Price:
985 downloads
kfilewatcher 0.1
kfilewatcher project watches for file changes and allows you to react on them. more>>
kfilewatcher project watches for file changes and allows you to react on them.
Example:
kfilewatcher /tmp/test 2>&1 | while read a; do echo "File has changed - doing something"; done
This command does something every time kfilewatcher detects a change. At the moment, the only action is to output "File has changed - doing something", but you can write anything there, e.g.
- backup stuff as soon as it changes
- publish files on your homepage everytime they change
- keep directories in sync
<<lessExample:
kfilewatcher /tmp/test 2>&1 | while read a; do echo "File has changed - doing something"; done
This command does something every time kfilewatcher detects a change. At the moment, the only action is to output "File has changed - doing something", but you can write anything there, e.g.
- backup stuff as soon as it changes
- publish files on your homepage everytime they change
- keep directories in sync
Download (1.7MB)
Added: 2006-12-28 License: GPL (GNU General Public License) Price:
1030 downloads
Simple PHP Calendar 1.11
Simple PHP Calendar is a a simple, extensible PHP calendar class. more>>
Simple PHP Calendar is a a simple, extensible PHP calendar class. The project focuses exclusively on generating an HTML representation for a given month. It is meant to be easily extended for use in other applications, such as input widgets for forms, or full event calendaring applications. Its output is completely customizable via CSS.
A simple example
After downloading the class and including it in your PHP script, youre ready to start using it. The constructor requires two paramets, a year and month. The following code produces a very plain looking calendar.
1 require_once( class.Calendar.php );
2 $cal = new Calendar (2004, 3 );
3 echo "".$cal->getFullMonthName()."";
4 echo $cal->display();
Customizing the display
You can use two methods to change how the calendar is displayed. Use setTableWidth to define how wide to make the table, in pixels or as a percentage of the screen. Use setDayNameFormat to change how weekdays are displayed in the header row using strftime formats.
1 require_once(class.Calendar.php);
2 $calendar = new Calendar (2004, 4);
3 $calendar->setTableWidth(50%);
4 $calendar->setDayNameFormat(%A);
5 echo "".$calendar->getBriefMonthName().";
6 echo $calendar->display();
Final Example
You can use CSS selectors to control the formatting of all aspects of the calendar, including adding borders and how empty boxes display. Lets wrap our talbe in a div named calendar and use the following styles.
/* overall table */
#calendar table {
border:1px solid #fff;
padding: 0;
margin:20px;
}
/* the day headers across the top */
#calendar th {
background: #565;
color: #fff;
margin: 3px;
padding: 2px 5px;
}
/* how days this month will look, make dates appear in top right */
#calendar td {
background: #eee;
color: #000;
padding: 2px;
margin:0;
height:60px;
text-align:right;
vertical-align:top;
border:1px solid #fff;
}
/* these are the days falling outside this month */
#calendar td.notInMonth {
background: #999;
}
Enhancements:
- The documentation has been polished.
- An example has been added for extending the class to customize how a calendar grid will display.
<<lessA simple example
After downloading the class and including it in your PHP script, youre ready to start using it. The constructor requires two paramets, a year and month. The following code produces a very plain looking calendar.
1 require_once( class.Calendar.php );
2 $cal = new Calendar (2004, 3 );
3 echo "".$cal->getFullMonthName()."";
4 echo $cal->display();
Customizing the display
You can use two methods to change how the calendar is displayed. Use setTableWidth to define how wide to make the table, in pixels or as a percentage of the screen. Use setDayNameFormat to change how weekdays are displayed in the header row using strftime formats.
1 require_once(class.Calendar.php);
2 $calendar = new Calendar (2004, 4);
3 $calendar->setTableWidth(50%);
4 $calendar->setDayNameFormat(%A);
5 echo "".$calendar->getBriefMonthName().";
6 echo $calendar->display();
Final Example
You can use CSS selectors to control the formatting of all aspects of the calendar, including adding borders and how empty boxes display. Lets wrap our talbe in a div named calendar and use the following styles.
/* overall table */
#calendar table {
border:1px solid #fff;
padding: 0;
margin:20px;
}
/* the day headers across the top */
#calendar th {
background: #565;
color: #fff;
margin: 3px;
padding: 2px 5px;
}
/* how days this month will look, make dates appear in top right */
#calendar td {
background: #eee;
color: #000;
padding: 2px;
margin:0;
height:60px;
text-align:right;
vertical-align:top;
border:1px solid #fff;
}
/* these are the days falling outside this month */
#calendar td.notInMonth {
background: #999;
}
Enhancements:
- The documentation has been polished.
- An example has been added for extending the class to customize how a calendar grid will display.
Download (0.002MB)
Added: 2007-01-24 License: GPL (GNU General Public License) Price:
1013 downloads
Configuration with no services supported
Configuration with no services supported script is for a single host firewall configuration with no services supported. more>>
Configuration with no services supported script is for a single host firewall configuration with no services supported by the firewall machine itself.
Sample:
# USER CONFIGURABLE SECTION
# The name and location of the ipchains utility.
IPTABLES=iptables
# The path to the ipchains executable.
PATH="/usr/local/sbin"
# Our internal network address space and its supporting network device.
OURNET="10.5.0.0/24"
OURBCAST="10.5.0.255"
OURDEV="eth0"
# The outside address and the network device that supports it.
ANYADDR="0/0"
ANYDEV="ppp0"
# The TCP services we wish to allow to pass - "" empty means all ports
# note: comma separated
TCPIN="ssh,ftp,ftp-data"
TCPOUT="smtp,www,ssh,telnet,ftp,ftp-data,irc,http"
# The UDP services we wish to allow to pass - "" empty means all ports
# note: comma separated
UDPIN="domain"
UDPOUT="domain"
# The ICMP services we wish to allow to pass - "" empty means all types
# ref: /usr/include/netinet/ip_icmp.h for type numbers
# note: comma separated
ICMPIN="0,3,11"
ICMPOUT="8,3,11"
# Logging; uncomment the following line to enable logging of datagrams
# that are blocked by the firewall.
# LOGGING=1
# END USER CONFIGURABLE SECTION
####################################
# Flush the Input table rules
echo -n Flushing forward... && {
$IPTABLES -F FORWARD
} && echo done
# We want to deny incoming access by default.
# echo -n Denying incoming access... && {
# $IPTABLES -P FORWARD drop
# } && echo done
# Drop all datagrams destined for this host received from outside.
echo -n Dropping incoming datagrams... && {
$IPTABLES -A INPUT -i $ANYDEV -j DROP
} && echo done
# SPOOFING
# We should not accept any datagrams with a source address matching ours
# from the outside, so we deny them.
echo -n Preventing spoofing... && {
$IPTABLES -A FORWARD -s $OURNET -i $ANYDEV -j DROP
} && echo done
# SMURF
# Disallow ICMP to our broadcast address to prevent "Smurf" style attack.
echo -n Preventing SMURFs... && {
$IPTABLES -A FORWARD -p icmp -i $ANYDEV -d $OURNET -j DROP
} && echo done
# We should accept fragments, in iptables we must do this explicitly.
echo -n Accepting fragments... && {
$IPTABLES -A FORWARD -f -j ACCEPT
} && echo done
# TCP
# We will accept all TCP datagrams belonging to an existing connection
# (i.e. having the ACK bit set) for the TCP ports were allowing through.
# This should catch more than 95 % of all valid TCP packets.
echo -n Accepting valid incoming tcp datagrams on existing connections... && {
$IPTABLES -A FORWARD -m multiport -p tcp -d $OURNET --dports $TCPIN ! --tcp-flags SYN,ACK ACK -j ACCEPT
} && echo done
echo -n Accepting valid outgoing tcp datagrams on existing connections... && {
$IPTABLES -A FORWARD -m multiport -p tcp -s $OURNET --sports $TCPIN ! --tcp-flags SYN,ACK ACK -j ACCEPT
} && echo done
# TCP - INCOMING CONNECTIONS
# We will accept connection requests from the outside only on the
# allowed TCP ports.
echo -n Accepting incoming tcp connections on allowed ports... && {
$IPTABLES -A FORWARD -m multiport -p tcp -i $ANYDEV -d $OURNET --dports $TCPIN --syn -j ACCEPT
} && echo done
# TCP - OUTGOING CONNECTIONS
# We will accept all outgoing tcp connection requests on the allowed TCP ports.
echo -n Accepting outgoing traffic on allowed tcp ports... && {
$IPTABLES -A FORWARD -m multiport -p tcp -i $OURDEV -d $ANYADDR --dports $TCPOUT --syn -j ACCEPT
} && echo done
# UDP - INCOMING
# allow UDP datagrams in on the allowed ports and back.
echo -n Allowing UDP datagrams in on the allowed ports and back... && {
$IPTABLES -A FORWARD -m multiport -p udp -i $ANYDEV -d $OURNET --dports $UDPIN -j ACCEPT
$IPTABLES -A FORWARD -m multiport -p udp -i $ANYDEV -s $OURNET --sports $UDPIN -j ACCEPT
} && echo done
# UDP - OUTGOING
# We will allow UDP datagrams out to the allowed ports and back.
echo -n Allowing UDP datagrams out on the allowed ports and back... && {
$IPTABLES -A FORWARD -m multiport -p udp -i $OURDEV -d $ANYADDR --dports $UDPOUT -j ACCEPT
$IPTABLES -A FORWARD -m multiport -p udp -i $OURDEV -s $ANYADDR --sports $UDPOUT -j ACCEPT
} && echo done
# ICMP - INCOMING
# We will allow ICMP datagrams in of the allowed types.
# echo -n Allowing ICMP datagrams in of the allowed types... && {
# $IPTABLES -A FORWARD -p icmp -i $ANYDEV -d $OURNET --icmp-type $ICMPIN -j ACCEPT
# } && echo done
# ICMP - OUTGOING
# We will allow ICMP datagrams out of the allowed types.
# echo -n Allowing ICMP datagrams out of the allowed types... && {
# $IPTABLES -A FORWARD -p icmp -i $OURDEV -d $ANYADDR --icmp-type $ICMPOUT -j ACCEPT
# } && echo done
# DEFAULT and LOGGING
# All remaining datagrams fall through to the default
# rule and are dropped. They will be logged if youve
# configured the LOGGING variable above.
#
# DoS
# enabling Syn-flood protection
echo -n Enabling Syn-flood protection... && {
iptables -A FORWARD -p tcp --syn -m limit --limit 1/s -j ACCEPT
} && echo done
# Enabling Furtive port scanner protection
echo -n Enabling Furtive port scanner protection... && {
iptables -A FORWARD -p tcp --tcp-flags SYN,ACK,FIN,RST RST -m limit --limit 1/s -j ACCEPT
} && echo done
# Enabling ping of death protection
echo -n Enabling ping of death protection... && {
iptables -A FORWARD -p icmp --icmp-type echo-request -m limit --limit 1/s -j ACCEPT
} && echo done
if [ "$LOGGING" ]
then
# Log barred TCP
$IPTABLES -A FORWARD -m tcp -p tcp -j LOG
# Log barred UDP
$IPTABLES -A FORWARD -m udp -p udp -j LOG
# Log barred ICMP
$IPTABLES -A FORWARD -m udp -p icmp -j LOG
fi
#
# end.
<<lessSample:
# USER CONFIGURABLE SECTION
# The name and location of the ipchains utility.
IPTABLES=iptables
# The path to the ipchains executable.
PATH="/usr/local/sbin"
# Our internal network address space and its supporting network device.
OURNET="10.5.0.0/24"
OURBCAST="10.5.0.255"
OURDEV="eth0"
# The outside address and the network device that supports it.
ANYADDR="0/0"
ANYDEV="ppp0"
# The TCP services we wish to allow to pass - "" empty means all ports
# note: comma separated
TCPIN="ssh,ftp,ftp-data"
TCPOUT="smtp,www,ssh,telnet,ftp,ftp-data,irc,http"
# The UDP services we wish to allow to pass - "" empty means all ports
# note: comma separated
UDPIN="domain"
UDPOUT="domain"
# The ICMP services we wish to allow to pass - "" empty means all types
# ref: /usr/include/netinet/ip_icmp.h for type numbers
# note: comma separated
ICMPIN="0,3,11"
ICMPOUT="8,3,11"
# Logging; uncomment the following line to enable logging of datagrams
# that are blocked by the firewall.
# LOGGING=1
# END USER CONFIGURABLE SECTION
####################################
# Flush the Input table rules
echo -n Flushing forward... && {
$IPTABLES -F FORWARD
} && echo done
# We want to deny incoming access by default.
# echo -n Denying incoming access... && {
# $IPTABLES -P FORWARD drop
# } && echo done
# Drop all datagrams destined for this host received from outside.
echo -n Dropping incoming datagrams... && {
$IPTABLES -A INPUT -i $ANYDEV -j DROP
} && echo done
# SPOOFING
# We should not accept any datagrams with a source address matching ours
# from the outside, so we deny them.
echo -n Preventing spoofing... && {
$IPTABLES -A FORWARD -s $OURNET -i $ANYDEV -j DROP
} && echo done
# SMURF
# Disallow ICMP to our broadcast address to prevent "Smurf" style attack.
echo -n Preventing SMURFs... && {
$IPTABLES -A FORWARD -p icmp -i $ANYDEV -d $OURNET -j DROP
} && echo done
# We should accept fragments, in iptables we must do this explicitly.
echo -n Accepting fragments... && {
$IPTABLES -A FORWARD -f -j ACCEPT
} && echo done
# TCP
# We will accept all TCP datagrams belonging to an existing connection
# (i.e. having the ACK bit set) for the TCP ports were allowing through.
# This should catch more than 95 % of all valid TCP packets.
echo -n Accepting valid incoming tcp datagrams on existing connections... && {
$IPTABLES -A FORWARD -m multiport -p tcp -d $OURNET --dports $TCPIN ! --tcp-flags SYN,ACK ACK -j ACCEPT
} && echo done
echo -n Accepting valid outgoing tcp datagrams on existing connections... && {
$IPTABLES -A FORWARD -m multiport -p tcp -s $OURNET --sports $TCPIN ! --tcp-flags SYN,ACK ACK -j ACCEPT
} && echo done
# TCP - INCOMING CONNECTIONS
# We will accept connection requests from the outside only on the
# allowed TCP ports.
echo -n Accepting incoming tcp connections on allowed ports... && {
$IPTABLES -A FORWARD -m multiport -p tcp -i $ANYDEV -d $OURNET --dports $TCPIN --syn -j ACCEPT
} && echo done
# TCP - OUTGOING CONNECTIONS
# We will accept all outgoing tcp connection requests on the allowed TCP ports.
echo -n Accepting outgoing traffic on allowed tcp ports... && {
$IPTABLES -A FORWARD -m multiport -p tcp -i $OURDEV -d $ANYADDR --dports $TCPOUT --syn -j ACCEPT
} && echo done
# UDP - INCOMING
# allow UDP datagrams in on the allowed ports and back.
echo -n Allowing UDP datagrams in on the allowed ports and back... && {
$IPTABLES -A FORWARD -m multiport -p udp -i $ANYDEV -d $OURNET --dports $UDPIN -j ACCEPT
$IPTABLES -A FORWARD -m multiport -p udp -i $ANYDEV -s $OURNET --sports $UDPIN -j ACCEPT
} && echo done
# UDP - OUTGOING
# We will allow UDP datagrams out to the allowed ports and back.
echo -n Allowing UDP datagrams out on the allowed ports and back... && {
$IPTABLES -A FORWARD -m multiport -p udp -i $OURDEV -d $ANYADDR --dports $UDPOUT -j ACCEPT
$IPTABLES -A FORWARD -m multiport -p udp -i $OURDEV -s $ANYADDR --sports $UDPOUT -j ACCEPT
} && echo done
# ICMP - INCOMING
# We will allow ICMP datagrams in of the allowed types.
# echo -n Allowing ICMP datagrams in of the allowed types... && {
# $IPTABLES -A FORWARD -p icmp -i $ANYDEV -d $OURNET --icmp-type $ICMPIN -j ACCEPT
# } && echo done
# ICMP - OUTGOING
# We will allow ICMP datagrams out of the allowed types.
# echo -n Allowing ICMP datagrams out of the allowed types... && {
# $IPTABLES -A FORWARD -p icmp -i $OURDEV -d $ANYADDR --icmp-type $ICMPOUT -j ACCEPT
# } && echo done
# DEFAULT and LOGGING
# All remaining datagrams fall through to the default
# rule and are dropped. They will be logged if youve
# configured the LOGGING variable above.
#
# DoS
# enabling Syn-flood protection
echo -n Enabling Syn-flood protection... && {
iptables -A FORWARD -p tcp --syn -m limit --limit 1/s -j ACCEPT
} && echo done
# Enabling Furtive port scanner protection
echo -n Enabling Furtive port scanner protection... && {
iptables -A FORWARD -p tcp --tcp-flags SYN,ACK,FIN,RST RST -m limit --limit 1/s -j ACCEPT
} && echo done
# Enabling ping of death protection
echo -n Enabling ping of death protection... && {
iptables -A FORWARD -p icmp --icmp-type echo-request -m limit --limit 1/s -j ACCEPT
} && echo done
if [ "$LOGGING" ]
then
# Log barred TCP
$IPTABLES -A FORWARD -m tcp -p tcp -j LOG
# Log barred UDP
$IPTABLES -A FORWARD -m udp -p udp -j LOG
# Log barred ICMP
$IPTABLES -A FORWARD -m udp -p icmp -j LOG
fi
#
# end.
Download (MB)
Added: 2007-02-14 License: GPL (GNU General Public License) Price:
982 downloads
ICMP Hostname Tools for Linux 0.3
The ICMP Hostname Tools for Linux include a responder daemon, a lookup tool, and a nameswitch module. more>>
The ICMP Hostname Tools for Linux include a responder daemon, a lookup tool, and a nameswitch module to handle ICMP host name functions.
The NSS module caches all requests (including failures) and honors the TTL value sent by the responding host. It uses a configuration file called /etc/nss-icmp.conf, which controls different aspects of its operation:
* timeout Sets the timeout in milliseconds for ICMP host name queries, by passing the -t option to idnlookup.
* nocache Disables the cache.
* ttlnotfound Sets the TTL for not-found cache entries is seconds. The default is 5 minutes.
Both icmpdnd and idnlookup need to run as root, due to the fact that they use ICMP. Thus, idnlookup needs be installed SUID root.
<<lessThe NSS module caches all requests (including failures) and honors the TTL value sent by the responding host. It uses a configuration file called /etc/nss-icmp.conf, which controls different aspects of its operation:
* timeout Sets the timeout in milliseconds for ICMP host name queries, by passing the -t option to idnlookup.
* nocache Disables the cache.
* ttlnotfound Sets the TTL for not-found cache entries is seconds. The default is 5 minutes.
Both icmpdnd and idnlookup need to run as root, due to the fact that they use ICMP. Thus, idnlookup needs be installed SUID root.
Download (0.026MB)
Added: 2005-06-28 License: GPL (GNU General Public License) Price:
1579 downloads
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