I'm a systems administrator at an IT provider/consulting company, and although I'm very familiar with Windows servers and relatively familiar with Ubuntu, I'm new to Zentyal. I'm thinking of setting up a Zentyal server at home for my family. It would be used primarily as a gateway/firewall and http proxy (for clamav, ad-zapping, and spyware site blocking), and also a light duty file/print server and maybe some of the communications features like a shared calendar. As it's related to my work, I may experiment with the mail and VPN setup and maybe even a SIP softphone later on, although those won't likely be permanent additions. I may also run virtual machines on it from time to time but nothing too heavy and I do have other hardware for that.
I was thinking of possibly building a small form factor computer to serve this purpose. Something that would sit nicely next to my cable modem or under the desk. I might also use some old hardware I have lying around, but I'm concerned about the energy usage and heat output. I'm looking to make something energy-efficient that won't heat up the room which already has a high-powered gaming rig in it. If it can run with a 65W power supply for example, that's only the juice of three little wireless routers. I know it needs two NICs, but what else am I looking at as far as hardware specs? I might use an old laptop if not for the dual NIC requirement of being the gateway, or maybe there's a workaround like getting a USB wired NIC for the WAN link. Bear in mind this platform will be for 2-4 users, and Zentyal's listed recommended specs are for >50.
Can I make that happen with something like, say... a dual-core CPU, 2 GB RAM, and 320 GB HDD? More/less?
Thanks