ssh reverse connection

[Justin Krejci]

I have written a perl script that will try to determine your public IP
address if you are using NAT. In a nutshell what it does is make an HTTP
call to various websites that will reply with your source IP. It then tracks
changes to your IP. You can call the script regularly from cron. When it
notices a change it generates an email with the IP address info.

A previous method I used was for a simple HTTP request to go to my personal
web server to some non-existent file (gets a 404) then I had a cgi on the
web server that would parse the log for requests to that URL and return the
log entry to the browser.

Email me directly if you're interested.