ClamAV Anti-Virus toolkit
ClamAV is a UNIX Anti-virus tool designed to work directly with
your E-Mail server (through procmail) to scan and
filter message attachments containing viruses. While the ClamAV virus database is built off the
OpenAntiVirus database, ClamAV contains additional signatures
(virus definitions) and is kept up to date.
NOTE: While ClamAV is an excellent anti-virus program, it should
not be used as a replacement for anti-virus software on your local PC. ClamAV is designed to suplement
such programs and provide additional safeguards, but does not provide the extensive anti-virus capabilities
(including protection from Web based or TCP/IP based attacks) that a local anti-virus program can provide.
Installation
To install ClamAV on your server, simply
SSH to your VPS2,
su to root and run the following command at the prompt:
# vinstall clamav
During the vinstall, you will be prompted to configure ClamAV's scanning behavior (either to automatically scan
incoming mail or not), and where to quarantine infected files. We recomend selecting the default for both these
options. After the install completes, tcsh users may need to run rehash to load the ClamAV program
paths into their PATH and MANPATH.
If you don't already have procmail installed on your server, the ClamAV install will install it and set it up as
your LDA. If you already have procmail installed and have your own recipies in use, you should check your
/usr/local/etc/procmailrc to see that the ClamAV recipies get put where you need them to be (depending
on how you are filtering messages, you may want the ClamAV recipies to be at the beginning of your file).
When ClamAV is installed, a crontab entry is added to the system crontab file (/etc/crontab) to update
your virus database twice daily using the freshclam program.
Documentation
For documentation of ClamAV, you may want to consult the clamscan(1), clamd(1),
freshclam(1), and clamav.conf(5) manpages. You can also find documentation on the ClamAV Web
site:
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