IPFILTER Question

[Nevins, Peter]

Hello. I'm a firewall admin and have run into a question regarding your OS.
A client is running IPFILTER and cannot send mail to us here. We're running
a Raptor Firewall for NT (yes, NT). He sends a SYN and my system responds
with an ACK that is more on the lines of 1 million in length over the
expected 1024. His system drops the incoming packet from me thus no email
transfer. Having no working knowledge of IPFILTER, I don't know if it's on
my end or his. Do you have any previous problems noted where Raptor
Firewalls are the common denominator? 

Thanks for any assistance you can provide in this. I have a TCPDUMP if you
would like to see it or know of anyone who could help. 

Pete