Clamav can work in conjunction with pure-ftpd to not allow virus’s to be uploaded. Here are the steps. First install Clamav.


Edit /etc/pure-ftpd.conf and set


CallUploadScript yes
Patch /etc/init.d/pure-ftpd
Edit /etc/init.d/pure-ftpd
Look for $DAEMONIZE $fullpath /etc/pure-ftpd.conf -O clf:/var/log/xferlog $OPTIONS –daemonize

Under this add
$DAEMONIZE /usr/sbin/pure-uploadscript -B -r /var/run/pure-ftpd/clamscan.sh
Next look for kill $(cat /var/run/pure-ftpd.pid)
Under this add
kill $(cat /var/run/pure-ftpd/pure-uploadscript.pid)

/var/run/pure-ftpd/clamscan.sh 

#!/bin/sh

# /usr/local/bin/clamdscan is faster if clamd is running
CLAMLOC='/usr/local/bin/clamscan';

if [ ! -x $CLAMLOC ]; then
 echo 'clamscan not found';
 exit;
fi
if [ "$1" = "" ]; then
 echo 'Variable is blank';
 exit;
fi
if [ ! -f "$1" ]; then
 echo "$1 file not found"
 exit;
fi

# maybe you would prefer --move=/DIRECTORY instead of remove
$CLAMLOC --remove=yes $1
and then chmod to 755

The above calles –remove. This will of course delete the file if its detected as a virus. You may want to instead use –move
 --move=DIRECTORY
 Move infected files into DIRECTORY. Directory must be writable
 for the 'clamav' user or unprivileged user running clamscan.

Restart FTP 

/etc/init.d/pure-ftpd restart

Testing

Upload the EICAR test file to test if clamav is working
X5O!P%@AP[4\PZX54(P^)7CC)7}$EICAR-STANDARD-ANTIVIRUS-TEST-FILE!$H+H*