I would like to try installing a hardware firewall for some of my virus-prone customers, to supplement their software firewalls. We are talking very small networks, typically consisting of no more than five Win7 PCs. All they do is some filesharing and internet access. Typically they currently have a DSL modem and a basic router in place.
It it exists, I would like to find a hardware firewall device with these attributes:
1) Low front-end cost AND annual cost.
2) Easy to set up and maintain, for a simple network like this.
3) Good vendor tech support.
Any clear, specific guidance and recommendations would be appreciated, keeping in mind that I (obviously) know very little at all about hardware firewalls. TIA