Thus spoke Smelly Pooh:
>> I suspect they would, but that's a configuration issue, firewalls if they're
> blocking/dropping TCP connections look for the initial SYN, not the ACK to the
> SYN ACK.
If the fw is denying any inbound TCP connection to a certain port, it'll look
at the dst socket and drop/reject. If it's configured to permit inbound
established, it'll look for an ACK. (packet filter only, stateful inspection
firewalls may be more intelligent). This is a hole in itself, but that's
another story.
s.
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