Hi all:
I have 2 DMZ mail servers (FC4 / Postfix / Amavis / SA) that relay to
an internal mail server.
The internal mail server traditionally has been handling all the
filtering / SA rules, etc.
I want to shift that burden to the mail gateways in the DMZ.
Question:
Do you set up master.cf to use amavisd only (and it will call spamd)?
Do you daisy chain them together?
([AMaViS] in:10025 | out:10026 [SPAMD] in:10026 out:10027) ???
Or - should I be using a 'smtp_proxy' as content filter and point that
at amavisd?
I want them to let amavisd do all the pre-processing before allowing
mail to enter the queue. (So I'll assume that it runs it's own
checks, scans for virus, if pass - then off to regex land and calls to
spamc)
For the mail that remains, allow it into the queue and let postfix run
it's own header / body mime checks, etc and finish by delivering to
the internal mail server.
Advice? Ideas? Direction?
Thanks.
-Peter
[example master.cf from the DMZ] *that I don't think will work as I
envisage. :-)
# ==========================================================================
# service type private unpriv chroot wakeup maxproc command + args
# (yes) (yes) (yes) (never) (100)
# ==========================================================================
smtp inet n - n - - smtpd -o
smtpd_proxy_filter=127.0.0.1:10025
smtp inet n - n - - smtpd -o
content_filter=spamd
# ORIG_LINE smtp inet n - n - - smtpd
#smtps inet n - n - - smtpd
# -o smtpd_tls_wrappermode=yes -o smtpd_sasl_auth_enable=yes
#submission inet n - n - - smtpd
# -o smtpd_enforce_tls=yes -o smtpd_sasl_auth_enable=yes
pickup fifo n - n 60 1 pickup
cleanup unix n - n - 0 cleanup
qmgr fifo n - n 300 1 qmgr
rewrite unix - - n - - trivial-rewrite
bounce unix - - n - 0 bounce
defer unix - - n - 0 bounce
flush unix n - n 1000? 0 flush
proxymap unix - - n - - proxymap
smtp unix - - n - - smtp
relay unix - - n - - smtp
showq unix n - n - - showq
error unix - - n - - error
local unix - n n - - local
virtual unix - n n - - virtual
lmtp unix - - n - - lmtp
#
# Interfaces to non-Postfix software.
#
maildrop unix - n n - - pipe
flags=DRhu user=vmail argv=/usr/local/bin/maildrop -d ${recipient}
#
# The Cyrus deliver program has changed incompatibly, multiple times.
#
old-cyrus unix - n n - - pipe
flags=R user=cyrus argv=/cyrus/bin/deliver -e -m ${extension} ${user}
# Cyrus 2.1.5 (Amos Gouaux)
cyrus unix - n n - - pipe
user=cyrus argv=/cyrus/bin/deliver -e -r ${sender} -m ${extension} ${user}
uucp unix - n n - - pipe
flags=Fqhu user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail ($recipient)
ifmail unix - n n - - pipe
flags=F user=ftn argv=/usr/lib/ifmail/ifmail -r $nexthop ($recipient)
bsmtp unix - n n - - pipe
flags=Fq. user=foo argv=/usr/local/sbin/bsmtp -f $sender $nexthop $recipient
smtp inet n - n - - smtpd
-o smtpd_proxy_filter=127.0.0.1:10025
127.0.0.1:10026 inet n - n - - smtpd
-o smtpd_authorized_xforward_hosts=127.0.0.0/8
-o smtpd_client_restrictions=
-o smtpd_helo_restrictions=
-o smtpd_sender_restrictions=
-o smtpd_recipient_restrictions=permit_mynetworks,reject
-o smtpd_data_restrictions=
-o mynetworks=127.0.0.0/8
-o receive_override_options=no_unknown_recipient_checks
smtp-amavis unix - - n - 2 smtp
-o smtp_data_done_timeout=1200
-o smtp_send_xforward_command=yes
-o disable_dns_lookups=yes
127.0.0.1:10027 inet n - n - - smtpd
-o content_filter=
-o local_recipient_maps=
-o relay_recipient_maps=
-o smtpd_restriction_classes=
-o smtpd_client_restrictions=
-o smtpd_helo_restrictions=
-o smtpd_sender_restrictions=
-o smtpd_recipient_restrictions=permit_mynetworks,reject
-o myhostname=post-virus-pluto.scarceskills.com
-o mynetworks=127.0.0.0/8
-o strict_rfc821_envelopes=yes
-o smtpd_error_sleep_time=0
-o smtpd_soft_error_limit=1001
-o smtpd_hard_error_limit=1000
spamd unix - n n - - pipe
user=spam argv=/usr/bin/spamc -f -e /usr/sbin/sendmail.postfix
-oi -f ${sender} ${recipient}
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