Filter connections based on the hostname.

[Miroslav Lachman]

atar wrote on 06/16/2016 13:38:
>> atar wrote on 06/16/2016 09:15:

>>> Can you give me any hint how to cause PF to redirect all the traffic through the squid proxy? I'm pretty new in them both (PF and squid).
>>
>> You can find basic config here
>> http://wiki.squid-cache.org/ConfigExamples/Intercept/FreeBsdPf
>>
>> Squid can be installed from ports / packages
>> http://www.freshports.org/www/squid/
>>
>> Miroslav Lachman
>
> Hi and thanks for your willing to help.
>
> Unfortunately, I didn't succeed to redirect the network traffic through the squid server.
>
> I've putted the following line in my pf.conf:
>
> rdr pass inet proto tcp from any to any -> 127.0.0.1 port 3128
>
> since the squid server is listening on port 3128, but the traffic isn't going through it.
>
> I've also verified that no traffic is redirected to port 3128 by running the command: nc -l 3128.
>
> I've no idea what is wrong here.

Are you trying to block traffic originating on machine with PF and Squid 
or is this machine firewall for LAN?

I think you need to add port www (or port {80, 443}) to your rdr rule 
and also specify on which interface you want to do this translation. If 
you need to filter traffic from your LAN to outside world you need to 
specify LAN interface.

Something like this

rdr on $int_if inet proto tcp from any to any port www -> 127.0.0.1 port 
3128

pass in on $int_if inet proto tcp from any to 127.0.0.1 port 3128 keep state
pass out on $ext_if inet proto tcp from any to any port www keep state


More resources can be found here

http://serverfault.com/questions/490926/freebsd-pf-squid-transparent
http://www.benzedrine.ch/transquid.html
https://forums.freebsd.org/threads/10874/

Miroslav Lachman