XP-Web Server - Norton Business Suite - What protection do I need?

I have an XP box I am using as a Web server with Norton Business Suite from Comcast installed on it. ISP is Comcast. Netgear Firewall/Router.

 

I do not have an email client installed, nor do I surf the web from it. It just serves up a few pages, some images and has a couple of simple asp redirect scripts on it. No pages that allow uploads of any kind.

 

I upload the files myself from my own computer (with NBS) over a secure VPN.

 

What can I disable in NBS on the server that I do not need? Real-Time scanning? Firewall? Do I even need it installed at all?

 

Thanks!