MultiWAN: What you need

You will need a Linux box that you can use as a router; in the offices where we set this up we had previously commissioned a Linux box to do Squid proxying and VPN tunneling so we added to our existing setup. Please try to be power conscious by sharing infrastructure between your services or jump on the virtualisation band wagon if possible.

The scripts provided as examples in this tutorial are specific to Debian based distributions however they will easily port over too any other distribution. The changes you will need to make are the location the script is stored and the name of the equivalent variable for $IFACE. If you use this tutorial with another distribution please add comments on what you had to change.

We used 2 NICs in each of our MultiWAN routers. One for the local DMZ (i.e. router and ADSL modems) and one for the local private network. As you will see below the local private network is configured within two subnets; if your network is large enough you should use a separate NIC for each subnet. More on this later.

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