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Send email when TCP/IP address changes

Hi everyone, I'm looking a way to intercept the trigger/event when my server's IP address have changed to send me an email informing me that the new IP address is:....
Any suggestions would be appreciated. [solutions with dyndns.org I'm not interesed, I would like something with script,...]

Here is something I did a while ago. I haven't used it in a while. It looks like you'll have to create a directory called /etc/ipcheck/ . Just put the checkip somewhere and create a cron job to run it however often you want. Then put the mailmessage in the /etc/ipcheck directory you created. Make sure both of the files are executable.

Here is the file checkip

Code:

#!/bin/bash

#



/sbin/ifconfig eth1|grep "inet addr" > /etc/ipcheck/ipcheck.tmp



diffout=`diff --brief /etc/ipcheck/ipcheck /etc/ipcheck/ipcheck.tmp | awk '{ print $1 }'`



if [ -z $diffout ]; then

  # if diffout is empty (files match)

  rm -f /etc/ipcheck/ipcheck.tmp

else

  rm -f /etc/ipcheck/ipcheck

  mv -f /etc/ipcheck/ipcheck.tmp /etc/ipcheck/ipcheck



  ipstring=`cat /etc/ipcheck/ipcheck | awk '{ print $2 }'`



  /etc/ipcheck/mailmessage YOUREMAIL@DOMAIN.TLD $ipstring

fi

Here is the file mailmessage

Code:

#!/bin/bash

#



mail -s "Your IP Address Has Changed!" $1 << EOF

This is your new IP is $2

EOF

Thanx mate, you are great! :D

No Prob! And I forgot to mention you will need some sort of MTA running (sendmail or the like) and don't forget to replace YOUREMAIL@DOMAIN.TLD with your actual email address.

Good Luck!