Police Network from Bandwidth Hogs?

kramer2718 · 05-19-2008, 09:56 PM

Hi. A user (it's probably my roommate) on my home network is sucking down a ridiculous amount of bandwidth (or so I judge based on my crappy bandwidth). I admin the router that we both use, but it isn't a Linux box, it's just a cheap (although good) Belkin wireless/wired router. It lets my see all of the IPs it hands out (via DHCP), but not how much traffic goes to each. Is there a way using my box to see how many and what size packets he's sending receiving to estimate how much bandwidth he's using?

Pearlseattle · 05-20-2008, 02:29 PM

If the users are connected wireless, you could set your wireless card to promiscuous mode and grab the traffic, even if it is encrypted, using ethereal/wireshark and filter the traffic by destination IP number (or MAC?) therefore seeing how much it is flowing to that particular IP. See as well airodump and others.

lazareth1 · 05-30-2008, 04:46 AM

Setup a proxy and f&*k him/her up lol. Or you could just say to your roomy that your gonna charge them on a per packet basis! That would show them!

grizly · 05-30-2008, 05:18 AM

Quote:

Shaping by user can be interesting for small home networks. It allows you to give every user a fair share of available bandwidth which they can then use for whatever they like, removing the case where one user takes all bandwidth away from other users altogether.

The various approaches can also be combined using a classful scheduler like HTB. It allows you to first shape by user and then prioritize by traffic type for every user.

From: http://gentoo-wiki.com/HOWTO_Packet_Shaping

Sounds good, we need some of that in my network!

jomen · 06-19-2008, 06:00 AM

If you want (them) to have some fun instead and you are a little ambitious:
http://ex-parrot.com/~pete/upside-down-ternet.html

kenoshi · 06-19-2008, 01:32 PM

I'd recommend you install ntop, gives you easy to digest information, instantly tells you what your roommate is doing without having to make sense out of captures.