I'm curious any of these will meet my requirements: http://www.asaservers.com/showpages.asp?pid=1291
Basically, I intent to set up a firewall at my home office to maintain an IPsec VPN to my datacenter, as well as provide basic IPS features to the machines I will be using from home.
So essentially, my question boils down to "Will a dual-core 1.6 Atom with 2 GB of RAM be able to run IPsec + Snort on two interfaces?"
Maybe. Depends on the number of rules and the speed of your connection.
I'd suggest not getting any of the ones that say "Dual GigE LAN ports" because all their specs say Realtek chipsets are used for networking. The Intel ones are most defiantly preferred in my opinion.
The systems with the Intel NICs are not Atom boards.
While Intel NICs are certainly preferred, there's nothing wrong with Realtek Gig-E when you're talking about a home internet connection as they top out at 5-10x the typical 35-50Mbit/s for a high-end personal connection.
The "crappy" Realtek cards were all 100Mbit. The gigabit cards are quite a bit better; I've never had any problems with them.
Intel cards are of higher quality, for certain, but in most cases the Realtek cards will do just fine.