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trewornan wrote: > I've got a fairly basic network - internet router, wireless AP, Switch and a few > computers (my PC, my laptop, housemates laptop). I leave my wireless AP open so > that others can use it if they need to. > > The other day I noticed some heavy usage on the router and discovered that > someone was connected and using a considerable bandwidth - some nmapping, > arpspoofing and wiresharking revealed three "unknown" MACs connected to the AP one > of which I believe was downloading a bittorrent. > > I've no problem with people using my connection for a bit of browsing or > downloading email but as far as I'm concerned a large, high bandwidth bittorrent > is abusing the privilege so I blocked that MAC for 24 hours. Subsequently it > hasn't resumed the connection. > > However I now think I ought to keep a tighter rein on things and want to monitor > usage of the network. Is there any way to keep a log of usage statistics per IP > address on a switched network? Ideally without having to use arpspoof and reroute > all network traffic through my PC. > > > > Why not consider setting up something like Monwall's captive portal - you can then still leave your AP wide open but anyone connecting through it would need an account set up to access anything. All you need is a low spec PC with a couple of nics in it, you dont even need a HDD in it if you use an CF->IDE adapter and CF card - I had one set up for about 3 years allowing my neighbours access to the internet before they all got their own connections and never had any issues. Google "setting up a wireless captive portal" there is plenty of material out there :) Dave -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/linux_adm/list-faq.html