clamav/README.fedora

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Please note for Fedora and EPEL 7+ we use only systemd.
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A clamav-milter setup consists of the following three components:
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* the clamav-milter itself
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The main configuration is in /etc/mail/clamav-milter.conf and MUST
be changed before first use.
This can be enabled with: 'systemctl enable clamav-milter.service'
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* a clamav scanner daemon
The daemon is configured by /etc/clamd.d/scan.conf (which MUST be
edited before first use).
This can be enabled with: 'systemctl enable clamd@scan.service'
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* the MTA (sendmail/postfix)
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--> you should know how to install this...
When communicating across unix sockets with the clamav-milter, it is
suggested to use the /run/clamav-milter/clamav-milter.socket
path. You have to add something like
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INPUT_MAIL_FILTER(`clamav', `S=local:/run/clamav-milter/clamav-milter.socket, F=, T=S:4m;R:4m')dnl
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to your sendmail.mc.
* Changing permissions of directory /var/lib/clamav
Whenever ClamAV is upgraded by dnf, the permissions for the /var/lib/clamav directory change to user clamupdate
If for some reason you need DatabaseOwner be another user, you may copy /usr/lib/systemd/system/clamav-freshclam.service to /etc/systemd/system/
and add ExecStartPre=+/usr/bin/chown youruser:yourgroup /var/lib/clamav and updates won't break your configuration ...
Please add comments to https://bugzilla.redhat.com/show_bug.cgi?id=2023371 if not work for you or if you have any suggestion.
Note: =+ on systemd.service (man 5 systemd.service, Special executable prefixes)
If the executable path is prefixed with "+" then the process is executed with full privileges.
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EXAMPLE
=======
For clamav-milter, a possible setup might be created by
A) On the MTA (assumed hostname 'host-mta')
1. Add to sendmail.mc
| INPUT_MAIL_FILTER(`clamav', `S=inet:6666@host-milter, F=, T=S:4m;R:4m')dnl
2. Rebuild sendmail.cf
B) On the clamav-milter host (assumed hostname 'host-milter')
1. Install clamav-milter + clamav-milter-upstart packages
2. Set in /etc/mail/clamav-milter.conf
| MilterSocket inet:6666
| ClamdSocket tcp:host-scanner:6665
and all the other options which are required on your system
3. Enable clamav-milter.service:
| systemctl enable clamav-milter.service
Restart your system or execute
| systemctl start clamav-milter.service
4. Add something like
| iptables -N IN-cmilt
| iptables -A IN-cmilt -s host-mta -j ACCEPT
| iptables -A IN-cmilt -j DROP
| iptables -A INPUT -p tcp --dport 6666 -j IN-cmilt
to your firewall setup
C) On the clamav-scanner host (assumed hostname 'host-scanner')
1. Install clamd
2. Add to /etc/clamd.d/scan.conf
| TCPSocket 6665
| TCPAddr host-scanner
comment out possible 'LocalSocket' lines and set all the other
options which are required on your system
3. Enable clamd@scan.service:
| systemctl enable clamd@scan.service
Restart your system or execute
| systemctl start clamd@scan.service
4. Add something like
| iptables -N IN-cscan
| iptables -A IN-cscan -s host-milter -j ACCEPT
| iptables -A IN-cscan -j DROP
| iptables -A INPUT -p tcp --dport 6665 -j IN-csan
to your firewall setup