PF: block out port 80 so that not allow clients in LAN to browse Internet via port 80

[RW]

On Tue, 25 Sep 2007 20:52:16 +0700
vuthecuong <cuongvt at fpt.vn> wrote:

> Recently I used squid for cache proxy configured  to go internet
> through port 3128.
> But internet browser in LAN still connect to Internet through port 80
> if in conenction option of Internet browser is chose to connect
> directly to internet,
> not through proxy server.
> So how can I block out port 80 so that LAN clients must go to
> internet through port
> 3128 via proxy server?
> Tnx in advanced
> ________________

Blocking a port with PF is really basic. If you have to ask you would
be better-off reading about PF first, before you do anything. 

http://www.openbsd.org/faq/pf/index.html