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 bzip2-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.
  
  
• Create and chown the /usr/local/share/clamav directory:
  mkdir /usr/local/share/clamav
  chown clamav:clamav /usr/local/share/clamav
  
  
• 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
  
  
• Install the example init script that we provide:
  curl configserver.com/free/clamd -o /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.