Redirect Rules to Squid

[humaxoid]

Hello to all!
I write LAN rules. First, I want to deny access to everyone. After that, I'll start opening some ports. In that, everything is clear.
But I can 't wrap it on a transparent squid. I. e. I have to wrap requests from LAN coming to port 80, to port Squid 3128. How to do it correctly?
Many thanks!