> Thanks for telling me, accidently uploaded the wrong files. Replaced the
> archive and now the correct files are available.
> http://lechtermann.net/pub/OpenBSD/dumps.tgz

That's better!

It appears that all of the TCP segments generated by the server after the 3WHS
has completed have incorrect TCP header checksums (the 3WHS completes
successfully in both cases). This is the case for both the keep state and
modulate state versions, so doesn't explain why one works and the other
doesn't... I'll see if I can find some time to investigate further...

Are there packets being dropped/logged by PF and/or messages in the system
logs re the incorrect checksums (or other reasons for discarding packets)?
--
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=> Joel Sing | joel@ionix.com.au | 0419 577 603 <=
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"Real stupidity beats artificial intelligence every time."
- Terry Pratchett, Hogfather