> Interesting thought. Isn't the keepalive packet supposed to prevent that > from being a problem?
In theory, yes, but some firewalls try to be "smart" and look for simple repetitive traffic. A traceroute to determine a good sample of exactly how the packets are traversing the network might be a good next step. Then at least you'd have some idea of how A gets to B, and what might be in between. You might also try turning on the NJE keepalive -- wastes a little bandwidth, but that *definitely* doesn't look like repetitive traffic generated by J Random ScriptKiddie.
