* Michael Rogers <m.rogers at cs.ucl.ac.uk> [2006-04-24 21:39:28]: > Matthew Toseland wrote: > > Oh one other thing: It would be really nice if we could connect directly > > to nodes on the same LAN (or PC!). The main issue here is determining > > whether we ARE on the same LAN; we can find our LAN address very easily. > > Is there any harm in just sending a handshake packet to the peer's LAN > address, and trying the external address if there's no response from the > LAN address? Initially this seems like a security risk because it could > reveal that you're running a node, but in fact an eavesdropper on your > LAN can see all packets regardless of whether they're addressed to local > or remote peers, so I'm not sure any extra information is revealed. > > Cheers, > Michael
How is it possible to spy requests on the lan ? Up&p enabled routers/nats/boxes are likely to be switches, not hubs. On switched networks, it's not possible to spy non broadcasted/multicasted traffic unless you perform an attack. NextGen$
