Installing Digium’s g.729 codec for Asterisk on an OpenVZ VPS requires an Asterisk friendly VPS provider. This is because the installation routine relies on there being an ‘eth0′ device on the server. This is not normally the case with OpenVZ where the network device is called venet0.

An ‘eth0′ device can be created on the VPS by running the following command (this is done on the OpenVZ server) -
(see here for more information – http://wiki.openvz.org/Asterisk_G729)

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If you’ve installed Asterisk and FreePBX, or you’re using one of the preconfigured distributions such as Trixbox or Elastix, a good idea is to have the linux firewall, iptables, running on your system. Here’s an example of how you could set this up.

First thing to note is that it’s pretty easy to lock your self out of your server when playing around with iptables! It’s best to take a couple of simple precautions in case this happens.

These instructions should apply to CentOS/Redhat/Fedora.

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The Sysadminman Trixbox CE server template has been updated and is now running version 2.8. All new Trixbox servers will be built with version 2.8 unless otherwise requested.

Trixbox CE 2.8 uses Asterisk 1.6 (rather than Asterisk 1.4)