Firewall question:

[Kirk Wood]

The keep alive packet for any connection is on the same port as the
connection. The difference you are seeing is that the firewall times out
the connection sooner then the keep alive packets are sent. This isn't
uncommon. In fact, often times it is done intentionally to prevent you
from breaching the firewall with "safe" looking programs that happen to
keep an open connection and then let whatever you want through.

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Kirk Wood
Cpt.Kirk at 1tree.net

Nothing is hard if you know the answer or are used to doing it.