In message <m0mYNeX-0004nMC @
com> sidney @
|but only if I know how. So, can anyone tell me how the router can
|distinguish between established connections and those initiated from
|the outside? That's actually the problem we've been discussing, and
|all this means is that Cisco has solved it, not how they do it.
I can't find the Cisco manual which describes this option right now, but from
a look in RFC 793 (which seems to confirm my memory) you should look at the SYN
bit in the TCP header, if it's set then the packet is a connection
establishment packet, otherwise its not.
Hope this answers,
CS System Group, Hebrew University, Jerusalem, Israel