How To Integrate ClamAV Into PureFTPd For Virus Scanning On Debian Squeeze

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Author: Falko Timme
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This tutorial explains how you can integrate ClamAV into PureFTPd for virus scanning on a Debian Squeeze system. In the end, whenever a file gets uploaded through PureFTPd, ClamAV will check the file and delete it if it is malware.

I do not issue any guarantee that this will work for you!

 

1 Preliminary Note

You should have a working PureFTPd setup on your Debian Squeeze server, e.g. as shown in this tutorial: Virtual Hosting With PureFTPd And MySQL (Incl. Quota And Bandwidth Management) On Debian Squeeze .

 

2 Installing ClamAV

ClamAV can be installed as follows:

apt-get install clamav clamav-daemon

 

3 Configuring PureFTPd

First we create the file /etc/pure-ftpd/conf/CallUploadScript which simply contains the string yes:

echo "yes" > /etc/pure-ftpd/conf/CallUploadScript

Next we create the file /etc/pure-ftpd/clamav_check.sh (which will call /usr/bin/clamdscan whenever a file is uploaded through PureFTPd)...

vi /etc/pure-ftpd/clamav_check.sh

#!/bin/sh
/usr/bin/clamdscan --remove --quiet --no-summary "$1"

... and make it executable:

chmod 755 /etc/pure-ftpd/clamav_check.sh

Now we edit /etc/default/pure-ftpd-common...

vi /etc/default/pure-ftpd-common

... and change the UPLOADSCRIPT line as follows:

[...]
# UPLOADSCRIPT: if this is set and the daemon is run in standalone mode,
# pure-uploadscript will also be run to spawn the program given below
# for handling uploads. see /usr/share/doc/pure-ftpd/README.gz or
# pure-uploadscript(8)

# example: UPLOADSCRIPT=/usr/local/sbin/uploadhandler.pl
UPLOADSCRIPT=/etc/pure-ftpd/clamav_check.sh
[...]

Finally we restart PureFTPd:

/etc/init.d/pure-ftpd-mysql restart

That's it! Now whenever someone tries to upload malware to your server through PureFTPd, the "bad" file(s) will be silently deleted.

 

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From: Anonymous

hello, please help

on server with ispconfig 3 not working, not scan the files, receive next mesage, think not have the corect privileges

lstat() failed: Permission denied. ERROR

Thank You

From: Samuele Tognini

Use the --fdpass option for clamdscan.