01-09-2013, 01:56 PM
Agreed with KSeemann about upgrading to 8GB. Check the RAM bar in 'Resource usage' on the Dashboard to be sure that your UTM sees all of the RAM - if you did a 32-bit install, you'll want to re-install with 64-bit.
Prior to V9, the second AV engine was clamv. I never saw a single catch by that if Avira missed something (which I can't document that it did), so all of my installations use only a single AV engine.
In V9, the engines are Avira and Sophos - both excellent. Since the engine used in Sophos Endpoint is the Sophos engine, there's no reason to also run it on the UTM. I set the 'Single scan engine' to "Avira" on the 'Scan Settings' tab of 'System Settings' in the several installations I have of V9. This even for the sites that are not yet using Endpoint.
Cheers - Bob
ACE V7 - Astaro Preferred Partner since V3
Sophos Gold Solution Partner
Addicted to my iPhone!