Tapani,
> Is it possible to use p0f with dual-sendmail setup?
> Release notes only talk about sendmail/milter and
postfix,
> and mention postfix needs xforward extension - does
> sendmail have/need something similar?
xforward is Postfix-specific extension, sendmail can not
pass
such information over SMTP to a client. If amavisd-new is
used
with sendmail in a milter setup using Petr Rehor's milter
and AM.PDP protocol, client IP address is again available
to amavisd (passed over AM.PDP protocol).
It would be possible to make a small milter to query p0f
and insert the information in mail header. This way
SA could obtain the information on client OS fingerprint
from the header.
A third way would be to write a SA plugin that would query
p0f-analyzer directly, after obtaining client IP address
from the first trusted Received header field, which is
already parsed and known by SA. This would perhaps be the
most general purpose solution, and other users of SA would
benefit. In my implementation I just chose whatever was
simplest for me to implement at that time, which was to
do it in amavisd.
Mark
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