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Warning, this is really esoteric stuff. If you need it, you'll know. If
not, skip this section. Thanks to Lewis Shobbrook (lshobbrook@fasttrack.net.au) for contributing to this section.
If you are trying to setup a transparent proxy on a Linux machine that has
been configured as a bridge, you will need to add one additional iptables
command to what we had in section 5.
Specifically, you need to explicitly allow connections to the machine
on port 3128 (or any other port squid is listening on), otherwise the
machine will just forward them over to the other interface like a good
little bridge. Here's the magic words:
- iptables -A INPUT -i interface -p tcp -d your_bridge_ip -s local-network --dport 3128 -m state --state NEW,ESTABLISHED -j ACCEPT
Replacing interface with the interface that corresponds to
your_bridge_ip (typically eth0 or eth1). First time bridge users
should also note that you'll probably want to repeat the same command with
``3128'' replaced by ``telnet'' if you want to administer your bridge
remotely.
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