Reproducing iptables rules found in Transparent Proxy with Linux and squid mini-HOWTO

The new Firewall Builder CookBook chapter tries to reproduce iptables rules given in the "Transparent Proxy with Linux and squid mini-HOWTO" as close as possible to illustrate how this can be done in fwbuilder. The HOWTO provides two methods to redirect traffic to a standalone squid box, one uses NAT and another a combination of marking rules and policy routing. Both methods can be implemented in fwbuilder very closely. See the Cookbook recipe here.