I was trying to solve a problem with my linux router, so I investigated the /proc/net/nf_conntrack "file", and hacked up a quick perl script to make that file more user-friendly. I've been thinking about doing this for quite some time, so I wrote it up and posted the script. I hope someone else finds it useful too!

http://www.zaurus.org.uk/nf_conntrack.html

I would be pleased to get any feedback. I will clarify the text on the page a little when I've had more sleep!