I have got pfsense in my network with users as dhcp clients.
When i configured it as transparent proxy it doesnt work.
What might be the problem?
I want to block certain sites but that is not happening.
Please help me out.
You should install squid and squidguard. Follow the many instructions on the wiki or in the forum and you will be able to block sites pretty quickly and easily.
If this is going to be a production environment, stick to the Squid 2.* line as the 3.* package is ALPHA at this point. I was unable to get a functioning transparent proxy with 3.*