LAN Internet Filter/Traffic Monitor?

[STARDOUSER]

Anyone recommend a program to monitor and/or filter internet traffic on my LAN? I've got 8 comps and don't want my friends using them for pr0n or p2p stuff (since I already do that... the p2p stuff I mean)

[Frank]

I THINK you can set up MRTG to do this. http://people.ee.ethz.ch/~oetiker/webtools/mrtg/

[STARDOUSER]

MRTG seems pretty cool for monitoring the overall traffic on the network as a whole, but is there anyway I can see who's computer is specifically doing all the network usage?

[Frank]

I believe you can install SNMP services to each computer, and run MRTG for each computer. You can then pinpoint the culprit.

[OPaul]

Ethereal is a free network protocol analyzer for Unix and Windows. It allows you to examine data from a live network or from a capture file on disk. You can interactively browse the capture data, viewing summary and detail information for each packet. Ethereal has several powerful features, including a rich display filter language and the ability to view the reconstructed stream of a TCP session.

http://www.ethereal.com/

[+BudMan MVC]

Dude if you want a way to see what boxes are doing what as far as bandwidth, protocol usage (p2p, http, ftp, etc..) - use ntop http://www.ntop.org/ntop.html

Slick as HE_L!!!

To actually filter where they then go, what protocols they can talk etc.. you'll need more than a monitoring tool - how are you routing the traffic now? dsl/cable router or linux setup, ICS - what?

[GTX]

If you can set up a proxy server and make all 8 computers run through the proxy, you can disable certain protocols and block webpages. And, if you control the proxy, you can give yourself full access to the net :p