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Nick Hadaway <raker@gentoo.org>
Updated by Andrea Barisani <lcars@gentoo.org>
18/05/2004
Setting up clamav-milter on Gentoo Linux
Step 1 - Configure clamd
Check /etc/clamd.conf, default values should work out of the box but
read and understand all the options especially if you are going to
use it on production boxes.
Step 2 - Tell the init script to start clamd as well as freshclam and the
milter itself.
nano -w /etc/conf.d/clamd
START_CLAMD=yes
START_FRESHCLAM=yes
START_MILTER=yes
Step 3 - Inform your MTA about the new milter.
SENDMAIL
Step 3.a.1 - Edit sendmail.mc
Add these lines to sendmail.mc before any any other
INPUT_MAIL_FILTER lines and before MAILER(local)
NOTE: ANY INPUT_MAIL_FILTER definitions put before these lines
will be discarded due to the use of confINPUT_MAIL_FILTERS
Make this your first mail filter. :)
INPUT_MAIL_FILTER(`clmilter',`S=local:/var/run/clamav/clmilter.sock, F=, T=S:4m;R:4m')dnl
define(`confINPUT_MAIL_FILTERS', `clmilter')dnl
Step 3.a.2 - Rebuild sendmail.cf
cd /etc/mail
m4 sendmail.mc > sendmail.cf
POSTFIX
Step 3.b - Edit main.cf.
Add unix:/var/run/clamav/clamav-milter.sock to your
smtpd_milters line. If the line doesn't exist, just
stick it at the bottom of main.cf on a new line.
If you're appending, this is a space separated list.
If virus scanning is your most intensive test, you
may wish to put it on the end of the list so earlier,
easiser tests may punt the message before you go through the
trouble of virus scanning it.
Only one milter example:
# milters to run on network received mail.
smtpd_milters=unix:/var/run/clamav/clamav-milter.suck
Multiple milters example:
# milters to run on network received mail.
smtpd_milters=unix:/var/run/dkim-filter/dkim-filter.sock unix:/var/run/clamav/clamav-milter.sock
Step 5 - Adjust permissions for clamav-milter socket
Edit /etc/clamav-milter.conf and check/change MilterSocketGroup and MilterSocketMode
e.g. for postfix it would be this (sendmail,.. should be similar):
MiltersocketGroup postfix
MilterSocketMode 660
Step 6 - Start clamad
/etc/init.d/clamd start
Step 7 - Restart your MTA
SENDMAIL
/etc/init.d/sendmail restart
POSTFIX
/etc/init.d/postfix restart
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