Free nautilus setup background software for linux

GNOME floating background project subtly changes the color of the GNOME desktop over time -- so slowly that it wont be noticed. This is a good alternative to placing a wallpaper.

The program does have a minimal processor time consumption, as it
sleeps most of the time and its computations are not complicated. In
fact, GFloatbg doesnt change the color directly. It relies on
Nautilus (or an equivalent application) to paint the background using
the color set in the gconf key
/desktop/gnome/background/primary_color, which this program updates
periodically.

GFloatbg doesnt use any window, button or menu, and it can only be
stopped by killing it. This is a feature I dont like too much, but
making a realy nice user interface is just too much for such a little
joke...

GFloatbg starts with a random color and changes it deterministicly by
moving through a HSV-model of colors.

In the HSV-model, colors are described by three parameters:

h = hue stands for the tint of a color
(0 degrees is red, 60 = yellow, 120 = green, 180 = aquamarine, etc)
s = saturations stands for the brightness of the color
(0 = white, 1 = bright)
v = value stands for the intensity of the color
(0 = black, 1 = normal)

Every 10 seconds the hue is increased by 1 degree and the saturation
is changed by a sinus over the hue. The value remains fixed. The
default values are chosen such that all pastel tints are visited, but
these can of course be customized:

Usage: gfloatbg [options]
where options are:
-help
-value < float> (default 0.87)
-satmid < float> (default 0.375)
-satvar < float> (default 0.125)
-fase < float> (default 0.25)
value, (satmid-satvar) and (satmid+satvar) must be between 0 and 1

Nautilus actions is an extension for Nautilus, the gnome file manager. Nautilus-actions allow to configure program to be launch on files selected into Nautilus interface.

Each time you right-click on one or several selected files in nautilus, nautilus-actions will parse its config files to see if a program has been set for this selection. If it is the case, it will add an item in the menu that allow you to execute the program on the selected files.

This extentions is highly inspired from nautilus-sendto extentions from Roberto Majadas.

Nautilus-pr0n is a nautilus extension to view extended image information.
Nautilus-pr0n will add a new column, Geometry Info, to the list-view of Nautilus. Geometry Info contains the width and height of the image.
Enhancements:
- Fixed Makefile.am so the extension is installed to the right place

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

nautilus-image-converter project is a Nautilus extension to mass resize images.

Adds a "Resize Images..." menu item to the context menu of all images. This opens a dialog where you set the desired image size and file name.

A click on "Resize" finally resizes the image(s) using ImageMagicks convert tool.

Example netfilter setup contains a simple example on how to setup netfilter.

Warning this is experimental, I dont garantee this is 100% secure, it just does the work fine for me and i thought it could be a good jumpstart for people new to netfilter.

Now I am waiting for your corrections, suggestions and critics. Also I am gonna write a small addon for setting up dynamic rules cause i am tired of all these programs with dynamics port like bind, xdm and rpc.

Btw nmap -sU will still report udp dropping port as open.

nmap -sU -p 111 192.168.1.1

Mail::Toaster::Setup is a Perl module with methods to configure and build all the components of a modern email server.

The meat and potatoes of toaster_setup.pl. This is where the majority of the work gets done. Big chunks of the code and logic for getting all the various applications and scripts installed and configured resides in here.

METHODS

All documented methods in this package (shown below) accept two optional arguments, debug and fatal. Setting debug to zero will supress nearly all informational and debugging output. If you want more output, simply pass along debug=>1 and status messages will print out. Fatal allows you to override the default behaviour of these methods, which is to die upon error. Each sub returns 0 if the action failed and 1 for success.

arguments required:
varies (most require conf)

arguments optional:
debug - print status messages
fatal - die on errors (default)

result:
0 - failure
1 - success

Examples:

1. $setup->apache( debug=>0, fatal=>0 );
Try to build apache, do not print status messages and do not die on error(s).

2. $setup->apache( debug=>1 );
Try to build apache, print status messages, die on error(s).

3. if ( $setup->apache( ) { print "yay!n" };
Test to see if apache installed correctly.