Any suggestions for a network appliance that has virus protection and web content filter?

We have 3 community centers with public access pcs for the public. They’re each on their own LAN.

We currently use Cybersitter for the webcontent filter, Trend PCCillin for the virus checker, and Deep Freeze Pro so lock down the pcs.

Could anyone suggest a network appliance that has virus protection and web content filter?

Thanks.