Installing ClamAV with MailScanner

These instructions will configure ClamAV to use the clamd daemon:

These instructions are only to be used when installing MailScanner without our MSFE (MailScanner Front-End). MSFE now uses the cPanel provided Clamavconnector for virus scanning which is now installed automatically when you install MSFE.

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
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
```
Modify the freshclam configuration
```
mv -fv /usr/local/etc/freshclam.conf.sample /usr/local/etc/freshclam.conf
nano -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
```
Modify the clamd configuration
```
mv -fv /usr/local/etc/clamd.conf.sample /usr/local/etc/clamd.conf
nano -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
```
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 correct startup scripts depending on your OS

For CentOS/CloudLinux versions up to/including v6.x:
Install the example init script that we provide:

curl https://download.configserver.com/clamd -o /etc/init.d/clamd
chown root:root /etc/init.d/clamd
chmod +x /etc/init.d/clamd
chkconfig clamd onservice clamd restart

For CentOS/CloudLinux v7.x:
Install the example systemd script that we provide:

rm -fv /etc/init.d/clamd
curl https://download.configserver.com/clamd.service -o /usr/lib/systemd/system/clamd.service
systemctl daemon-reload
systemctl enable clamd.service
systemctl restart clamd.service

Link into cPanels Service Manager

nano -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:
```
nano -w /etc/chkserv.d/chkservd.conf
```
Add the following line:
```
clamav:1
```
At this point you can setup clamd in the MailScanner configuration:
```
nano -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.