Replacement for Existing Linux Shorewall

I am working in a school and they are having issues accessing certain sites. I have found the problem and i wish to remove it as we have no control over it. It's a legacy Linux box which has Shorewall providing a software firewall in between the network and the actual site firewall provided by the government.

I need however a device will do the job of this linux box as i can't change the internal IP of the cisco box, i know i simply need a box with 2 interfaces, internal and external that will NAT traffice but can anyone suggest something specific to do this translation as i don't want to overkill this with a full on firewall.
ItomicltdAsked:
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BrianCommented:
Sounds like you just need a basic office firewall like a Cisco RV042. Less than $200 and should do the job.
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ItomicltdAuthor Commented:
Can you suggest any other models besides the Cisco ? Just want some options.  
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