Free icmp redirect software for linux

Deadmans Redirect (DMR) is designed to replace whatever it is your browser loads when you click on the Home button in your browser.
DMR is a web-surfers power tool that can be completely customized to fit the needs of the user, without being tied to a specific instance of a browser.
DMR users can create/use aliases to their favorite search engines, drop in URLs for redirection, search through the history of all URLs/commands that have been entered into DMR, make small reminders/notes, and edit the powerful template system used by DMR.
DMR templates are called Views. Views use regular HTML with some DMR-specific keywords to define how DMR looks when your browser renders it.
The View system has support for RDF headlines from your favorite site(s), seperate listings of notes, aliases, views and history, and even a fortune (UNIX fortune must be installed.)
Main features:
- Shell-like history functions
- User defined automatic history exclusion
- Shell-like aliasing with arguments
- RDF/RSS headlines
- Completely customizable interface
- Example aliases act as a front-end to various search engines

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)

Egg::Plugin::Redirect::Body is a Perl module created to output of redirect screen etc.

SYNOPSIS

use Egg qw/ Redirect::Body /;

__PACKAGE__->egg_startup(

plugin_redirect => {
default_url => /,
default_wait => 0,
default_msg => Processing was completed.,
style => {
body => ..... ,
h1 => ..... ,
div => ..... ,
},
},

);

# redirect screen is output and processing is ended.
$e->redirect_body(/hoge_page, complete ok., alert => 1 );

# The HTML source of redirect screen is acquired.
my $html= $e->redirect_body_source(/hoge_page, complete ok., alert => 1 );

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.

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

ICPLD is a connection monitor which allows you to keep track of your network connection perfomance. It will log each occasion of broken networking.

icpld runs as a background process, and sends ICMP requests to an ip of your choice. When a reply isnt received within proper amount of time, it will consider the connection as unavailable and put a stamp in its log.

dnsreflector daemon listens for DNS queries on a local UDP port and answers with records pointing back to localhost. Combined with OpenBSDs packet filter pf(4) this works as a bandwidth efficient spamtrap.

dnsreflector was written and tested with OpenBSD. If you are interested in running dnsreflector on another platform, please contact me .

PF Setup

table < spamd > persist
rdr inet proto udp from < spamd > to any port 53 -> 127.0.0.1 port 53000

Usage

dnsreflector [-d] [-a address] [-p port]

-d Run as daemon in the background
-a address Bind to this address (default: 127.0.0.1)
-p port Bind to this port (default: 53000)

Linux: On popular demand I made a diff to compile dnsreflector with Linux (tested on SuSE). You will need a facility to redirect DNS queries coming from blacklisted hosts to dnsreflector. I dont know how to do this with Linux netfilter, but if you do, please tell me.