The situation is the following: LAN. of 7 PCs, 1 server as faylopomoyki and servers 1C. The requirement to close access to sites in General on 2 PCs, while other programs (business and postal) should remain in the ranks.
Question: What to do? To put something on the server? Meaning, I think, no, he is not a gateway to the Internet. And if you put on 2 PC locally, then what? And preferably freeware.
By the way OS is Windows 7.