[CentOS] Antivirus for CentOS? (yuck!)

> Yes, I know, it's really really embarrassing to have to ask but I'm
> being pushed to the wall with PCI DSS Compliance procedure
> (http://en.wikipedia.org/wiki/PCI_DSS) and have to either justify why
> we don't need to install an anti-virus or find an anti-virus to run on
> our CentOS 5 servers.
> Whatever I do - it needs to be convincing enough to make the PCI
> compliance guy tick the box.
> 1. Has anyone here gone though such a procedure and got good arguments
> against the need for anti-virus?

There is no good argument against running malware detection on any
sever.

> 2. Alternatively - what linux anti-virus (oh, the shame of typing this
> word combination :() do you use which doesn't affect our systems
> performance too much.

CLAMAV works well.

> The reviewed servers run both Internet-facing web applications and
> internal systems, mostly using proprietary protocol for internal
> communications. They are being administrated remotely via IPSec VPN
> (and possibly in the future also OpenVPN).