Network Leak Finder 0.1a

Netleak is a collection of small perlscripts that detects connectivity between network segments. It is mostly useful to detect "leaks" in large organizations that have private networks physically separated from the Internet.


Imagine some large corporation which has an internal development LAN were all sorts of sensitive information is flowing around. This corporation would likely have some very strict rules as to how its employees access the internet or other partner branches in order to
protect its information. For the systemadinistrator this is a daunting task - as the corporate LAN grows keeping track of all the routes through the network becomes extremely difficult. Some routers might simply have been forgotten over time or an employee might have gone wise and connected his own adsl-router or something alike.

Network Leak Finder tries to detect this in a centralized manner by sending out spoofed packets into the internal network and if any packets finds a way onto the external network, a "leak" has been detected. As an anology it works the same way you would find a hole in
a bucket: fill it with water and see if anything leaks.

In most scenarios the external network would be the Internet since everybody should be afraid of what their corporate LANs are leaking to it!