[Bug 242744] IPSec in transport mode between FreeBSD hosts blackholes TCP traffic

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Sat Dec 21 09:04:39 UTC 2019


--- Comment #8 from Eugene Grosbein <eugen at freebsd.org> ---
(In reply to Victor Sudakov from comment #5)

>In a FreeBSD - Windows 7 combination, this kind of transport mode works 
> transparently out of the box. I think Windows knows to adjust MSS, or something.

Can you enable some TCP service at FreeBSD side (f.e. inetd/echo or ftpd) and
check it out if Windows sets DF=1 for initial encrypted TCP SYN when you
connect from Windows to FreeBSD over such IPSec transport mode configuration?

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