Installing ClamAV with MailScanner

These instructions will configure ClamAV to use the clamd daemon:

• Make sure clamavconnector is NOT installed in WHM > Manage Plugins as this will break MailScanner
  
  
• If you would like to verify ClamAV's digital signatures on the virus definition files as they are updated through freshclam, you need to install GMP first:
  /scripts/ensurerpm gmp gmp-devel
  
  
• Next you will need to create a user for clamav to use:
  useradd clamav
  Some OS's require you to add the group as well:
  groupadd clamav
  Don't worry if the user and/or group already exist.
  
  
• Download the latest stable ClamAV distribution from http://www.clamav.net
  Note: If you are running Fedora Core 4 or earlier, you cannot install any version of ClamAV later than 0.91.2 because of a broken gcc.
  
  
• Expand the distribution and cd into the resultant directory and build ClamAV using:
  tar -xzf clamav-*
  cd clamav*
  ./configure --disable-zlib-vcheck
  make
  make install
  
  
• pico -w /usr/local/etc/freshclam.conf
  Comment out the line (put a # as the first character on the line) near the top that says simply:
  Example
  
  
• pico -w /usr/local/etc/clamd.conf
  Comment out the line (put a # as the first character on the line) near the top that says simply:
  Example
  
  
• pico -w /usr/local/etc/clamd.conf
  Change the following line:
  #LocalSocket /tmp/clamd.socket
  to this:
  LocalSocket /tmp/clamd
  
  
• Run ldconfig to create the necessary links and cache to most recent shared libraries
  ldconfig
  
  
• Run freshclam to download the latest definitions:
  freshclam
  
  
• Note: The following will no longer work as ClamAV has decided not to include the init examples in their latest version. You will have to create your own init script to start clamd or download an old version of ClamAV (pre-v0.95) and get the init script from there.
  
  /bin/cp -fv contrib/init/RedHat/clamd /etc/init.d/clamd
  chown root:root /etc/init.d/clamd
  chmod +x /etc/init.d/clamd
  chkconfig clamd on
  service clamd restart
  
  
• pico -w /etc/chkserv.d/clamav
  Add the following line:
  service[clamav]=x,x,x,service clamd restart,clamd,root
  
  
• Create an empty log file for clamav updates:
  touch /var/log/clam-update.log
  chown clamav:clamav /var/log/clam-update.log
  
• Add clamav to chkservd so that it will be monitored:
  pico -w /etc/chkserv.d/chkservd.conf
  clamav:1
  
  
• At this point you can setup clamd in the MailScanner configuration:
  pico -w /usr/mailscanner/etc/MailScanner.conf
  
  Set the following options:
  Virus Scanners = clamd
  Clamd Socket = /tmp/clamd
  
  
• Then restart MailScanner with:
  service MailScanner restart
  
  
• You can now set what domains you want scanned for viruses in:
  /usr/mailscanner/etc/rules/virus.scanning.rules
  

That's it. If you don't feel confident doing any of this yourself, or if you get into a horrible mess, we offer a cheap package to do it all for you, and more, over here.

*Remember that adding virus scanning of emails to MailScanner will add load to your server.