Difference between revisions of "ClamAV"

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[[Category:Networking (English)]]
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[[Category:Security]]
[[Category:HOWTOs (English)]]
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[[es:ClamAV]]
==== Clam AV installation====
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[[it:ClamAV]]
* Grab it<br><pre>pacman -Sy clamav</pre>
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[[ru:ClamAV]]
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[[sr:ClamAV]]
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[[zh-CN:ClamAV]]
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[http://www.clamav.net Clam AntiVirus] is an open source (GPL) anti-virus toolkit for UNIX.  It provides a number of utilities including a flexible and scalable multi-threaded daemon, a command line scanner and advanced tool for automatic database updates.  Because ClamAV's main use is on file/mail servers for Windows desktops it primarily detects Windows viruses and malware.
  
* Configure it
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== Installation ==
*# Edit /etc/clamav/clamd.conf, /etc/clamav/freshclam.conf and comment out the '''Example''' flag
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ClamAV can be [[pacman|installed]] with package {{Pkg|clamav}}, available in the [[Official Repositories]].
*# Edit /etc/conf.d/clamav and change the start options from "no" to "yes"<br>
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<pre># change these to "yes" to start
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START_FRESHCLAM="yes"
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START_CLAMD="yes"</pre>
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* Edit /etc/rc.conf and write clamav into the list of daemons, if you like to start clamav automaticaly when booting.
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== Configuration ==
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Whether you are going to use clamav as a daemon or use it as a simple file checker you need to comment out the line that contains the word ''Example'', usually it is found at the beginning of {{ic|/etc/clamav/freshclam.conf}} and {{ic|/etc/clamav/clamd.conf}} files.
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== Starting the daemon ==
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To start the daemon:
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# systemctl start clamd
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To start it automatically at boot:
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# systemctl enable clamd
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Also in {{ic|/etc/conf.d/clamav}} change the start options from "no" to "yes".
 +
 
 +
# change these to "yes" to start
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START_FRESHCLAM="yes"
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START_CLAMD="yes"
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== Updating database ==
 +
Edit the below file and comment out the line saying "Example"
 +
{{hc|/etc/clamav/freshclam.conf|
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# Comment or remove the line below.
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# Example
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}}
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Update the virus definitions with:
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# freshclam
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The database files are saved in:
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/var/lib/clamav/daily.cvd
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/var/lib/clamav/main.cvd
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 +
== Scan for Viruses ==
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{{ic|clamscan}} can be used to scan certain files, home directory, or an entire system:
 +
 
 +
$ clamscan myfile
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$ clamscan -r -i /home
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$ clamscan -r -i --exclude-dir=^/sys\|^/proc\|^/dev /
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If you would like {{ic|clamscan}} to remove the infected file use the {{ic|--remove}} option in the command.
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== Troubleshooting ==
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If you get the following messages after running freshclam:
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WARNING: Clamd was NOT notified: Cannot connect to clamd through
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/var/lib/clamav/clamd.sock connect(): No such file or directory
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 +
Add a sock file for clamav:
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# touch /var/lib/clamav/clamd.sock
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# chown clamav:clamav /var/lib/clamav/clamd.sock
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Then, edit {{Ic|/etc/clamav/clamd.conf}} &ndash; uncomment this line:
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LocalSocket /var/lib/clamav/clamd.sock
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Save the file and restart the daemon {{ic|systemctl restart clamd}}
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If you get the next error when starting the daemon:
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LibClamAV Error: cli_loaddb(): No supported database files found
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in /var/lib/clamav ERROR: Not supported data format
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 +
Run freshclam as root:
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# freshclam -v
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If you get a:
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# can't create temporary directory
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error,
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along with a 'HINT' containing a UID and a GID number.
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Do the following:
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# chown UID:GID /var/lib/clamav & chmod 755 /var/lib/clamav
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 +
# ex: chown 64:64

Revision as of 02:26, 25 November 2012

Clam AntiVirus is an open source (GPL) anti-virus toolkit for UNIX. It provides a number of utilities including a flexible and scalable multi-threaded daemon, a command line scanner and advanced tool for automatic database updates. Because ClamAV's main use is on file/mail servers for Windows desktops it primarily detects Windows viruses and malware.

Installation

ClamAV can be installed with package clamav, available in the Official Repositories.

Configuration

Whether you are going to use clamav as a daemon or use it as a simple file checker you need to comment out the line that contains the word Example, usually it is found at the beginning of /etc/clamav/freshclam.conf and /etc/clamav/clamd.conf files.

Starting the daemon

To start the daemon:

# systemctl start clamd

To start it automatically at boot:

# systemctl enable clamd

Also in /etc/conf.d/clamav change the start options from "no" to "yes".

# change these to "yes" to start
START_FRESHCLAM="yes"
START_CLAMD="yes"

Updating database

Edit the below file and comment out the line saying "Example"

/etc/clamav/freshclam.conf
# Comment or remove the line below.
# Example

Update the virus definitions with:

# freshclam

The database files are saved in:

/var/lib/clamav/daily.cvd
/var/lib/clamav/main.cvd

Scan for Viruses

clamscan can be used to scan certain files, home directory, or an entire system:

$ clamscan myfile
$ clamscan -r -i /home
$ clamscan -r -i --exclude-dir=^/sys\|^/proc\|^/dev /

If you would like clamscan to remove the infected file use the --remove option in the command.

Troubleshooting

If you get the following messages after running freshclam:

WARNING: Clamd was NOT notified: Cannot connect to clamd through 
/var/lib/clamav/clamd.sock connect(): No such file or directory

Add a sock file for clamav:

# touch /var/lib/clamav/clamd.sock
# chown clamav:clamav /var/lib/clamav/clamd.sock

Then, edit /etc/clamav/clamd.conf – uncomment this line:

LocalSocket /var/lib/clamav/clamd.sock

Save the file and restart the daemon systemctl restart clamd

If you get the next error when starting the daemon:

LibClamAV Error: cli_loaddb(): No supported database files found
in /var/lib/clamav ERROR: Not supported data format

Run freshclam as root:

# freshclam -v

If you get a:

# can't create temporary directory

error, along with a 'HINT' containing a UID and a GID number.

Do the following:

# chown UID:GID /var/lib/clamav & chmod 755 /var/lib/clamav 
# ex: chown 64:64