which brings up a question... what are the odds that someone could forcefully redirect traffic to their proxy after having compromised a network? Could this be done with arp poisoning? I haven't toyed with that in a while so I can't say yes or no...
If it's Ethernet, and you're on the same broadcast network, yes. Check out arpspoof (part of dsniff). You also need to setup a userspace router to forward the packets -- easiest way is fragrouter.
FYI : this also works quite well on wireless. ~Mike. _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/