Transparent proxy from different networks

Hi all:

I have a Squid running on 192.168.1.1 listening on 3128 TCP ****t. Users
from 192.168.1.0/24 can browse the Internet without problems thanks to a
REDIRECT rule in my shorewall config.

But users from differents networks (192.168.2.0/24, 192.168.3.0/24,
etc.) can't browse the Internet. Those networks are connected to
192.168.1.0/24 via a VPN connection.

My redirect rule in iptables syntax is like this:

iptables -t nat -A PREROUTING -s 0.0.0.0/24 -i eth2 -p tcp --d****t 80 -j
REDIRECT --to-****ts

Is there a restriction to work transparent proxy for other networks
different from 192.168.1.0/24? Do I have to configure squid to listen on
each range o network addresses?

Thanks


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