ClamAV - Updating clamd for releases earlier than ZCS 5.0.16

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For those using ZCS 5.0.16 and prior, come 15 April 2010 anti-virus definitions will no longer update AND your ClamAV instance will stop working entirely.

Zimbra includes ClamAV 0.95 as of ZCS 5.0.18+. The clamav-0.95.1 directory from an installed ZCS 5.0.18 or later installation can be copied directly to an earlier ZCS 5.0 server. To upgrade ClamAV, perform the following steps:

1. Install a new server with a later release of ZCS. The Free Open-Source release of ZCS is available at http://www.zimbra.com/downloads/os-downloads.html. This document was tested with 5.0.21, but any release starting with 5.0.18 or later will work. 2. After the installation is complete, tar up clamav-0.95.1 on the new server:

cd /opt/zimbra
tar cf /tmp/clamav-0.95.1.tar clamav-0.95.1

3. Copy this tar file to your existing ZCS server.

cd /opt/zimbra
scp user@server:/tmp/clamav-0.95.1.tar .

4. Untar the file.

tar xf clamav-0.95.1.tar

5. Stop ZCS services.

zmcontrol stop

6. Change the symbolic link

ln -s clamav-0.95.1 clamav
ls -l clamav

The output line will look similar to:

lrwxrwxrwx  1 root root 25 Apr  9 15:39 clamav -> /opt/zimbra/clamav-0.95.1

7. Start services.

zmcontrol start

You can confirm that the new version of ClamAV is running by checking /opt/zimbra/log/clamd.log. The most recent startup in the log should look similar to:

Fri Apr  9 15:57:16 2010 -> +++ Started at Fri Apr  9 15:57:16 2010
Fri Apr  9 15:57:16 2010 -> clamd daemon 0.95.1-broken-compiler (OS: linux-gnu, ARCH: i386, CPU: i686)

With ClamAV 0.95 in place, updates should continue uninterrupted after April 15, 2010, and your system will remain protected.

This procedure was tested using ZCS 5.0.21 and ZCS 5.0.7.

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