Add these rules to protect yourself againsed the SSH brute force attack.
iptables -A INPUT -p tcp –dport 22 -m state –state NEW -m recent –set –name SSH
iptables -N SSH_WHITELIST
iptables -A INPUT -p tcp –dport 22 -m state –state NEW -j SSH_WHITELIST
iptables -A SSH_WHITELIST -s $TRUSTED_HOST -m recent –remove –name SSH -j ACCEPT
iptables -A INPUT -p tcp –dport 22 -m state –state NEW -m recent –update –seconds 60 –hitcount 4 –rttl –name SSH -j ULOG –ulog-prefix SSH_brute_force
iptables -A INPUT -p tcp –dport 22 -m state –state NEW -m recent –update –seconds 60 –hitcount 4 –rttl –name SSH -j DROP

#!/bin/bash

TRUSTED_HOST1=10.0.0.0/8
IPTABLES=/sbin/iptables

$IPTABLES -F

$IPTABLES -A INPUT -p tcp --dport 22 -m state --state NEW -m recent --set --name SSH
$IPTABLES -N SSH_WHITELIST
$IPTABLES -N SSH_BF
$IPTABLES -A INPUT -p tcp --dport 22 -m state --state NEW -j SSH_WHITELIST

for I in 10.0.0.0/8 65.209.7.97/27; do
   $IPTABLES -A SSH_WHITELIST -s $I -m recent --remove --name SSH -j ACCEPT
done

#$IPTABLES -A INPUT -p tcp --dport 22 -m state --state NEW -m recent --update --seconds 60 --hitcount 4 --rttl --name SSH -j ULOG --ulog-prefix SSH_brute_force
#$IPTABLES -A INPUT -p tcp --dport 22 -m state --state NEW -m recent --update --seconds 60 --hitcount 4 --rttl --name SSH -j DROP

$IPTABLES -A INPUT -p tcp --dport 22 -m state --state NEW -m recent --name SSH --set --rsource -j SSH_BF
$IPTABLES -A SSH_BF -m recent ! --rcheck --seconds 60 --hitcount 3 --name SSH --rsource -j RETURN
$IPTABLES -A SSH_BF -j LOG --log-prefix "SSH Brute Force Attempt:  "
$IPTABLES -A SSH_BF -p tcp -j DROP

I’m posting this just because I’m sick of having to re-figure out the command line whenever I have to do it!

The idea is to process each file in the current path in the form of *.jpg, then resize it to a max of 96×96 (so when complete, the final image will not have a max dimension over 96, but it will scale so one dimension will likely be less), then write the new image into a pre-created folder from the current path named ‘converted’.

for I in *.jpg; do convert $I -resize 96x96 converted/$I; done

I know this is in Linux and there should be a Gimp category, but whatever…

I do this with regularity, and always have to Google the instructions. So here they are!
The Gimp: Making Colors in a GIF Transparent
By Crouse
USA Linux Users Group
Web Site: http://www.usalug.org

Sometimes when working with an image you want to make a certain color transparent. When working with a gif file this would make a round circle look round on any color background. This is actually very simple once you do it once. Finding the information for this took me a while so I thought I would pass it on to anyone that was interested.

1. Open your image in the gimp.

2. Right click the image and go to LAYERS then Transparency->ADD ALPHA CHANNEL.

3. Right click on the image again and go to SELECT and then down to BY COLOR.

4. Now click on the color in the image you want to be transparent. These colors will now show up outlined.

5. Right click on the image again and go to EDIT and then down to CLEAR (or Ctrl-X). This should now erase the outlined color you just picked from the image and the “transparent gimp checkerbox” should show through.

6. Right click on the image and choose SAVE AS and make sure to save as a GIF file if you want the transparency to work on the web.

Another fun feature that can be used while using the SELECT and BY COLOR ….. instead of hitting CLEAR you can FILL W BG COLOR or the other one FILL W FG COLOR ……….. this allows you to change the colors over the entire image instantly for the particular pixel color you choose to start with. Very fast and fun once you figure this out.