I am actually setting up a content filter for a SMB network. The company doesn't want to spend on expensive devices so i did some googling and found that linux + squid + dansguardian can do the job. I've attached a picture of how my network would look like.
I installed Ubuntu and squid and dansguardian on the server and it seems to filter ok (only on the server).
I would like all web traffic to be captured by the filter and forward to the router. I've only got 1 network card? is that enough? do i need two network cards? I would like to make the filter transparent so minimal changes need to be made.
What IP address should be on each CARD? eth0 and eth1?
i've googled many websites but none gives detailed examples on the network side of things.
Please help. Thanks.