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June 29th, 2008

How-To: Set up a LAN gateway with DHCP, Dynamic DNS and iptables on Debian Etch

Debian, Networking, Security, Server, by suvi.

Linux is a perfect platform to act as a router/gateway.

In this tutorial, I will explain how to set up a Linux box to operate as a network router. The box will provide the following services:

* DHCP server to provide the ip addresses to the machines in the LAN

* DNS server to resolve domain names

* Gateway with IP tables to give access to the Internet.

* Firewall with IP tables.

The resulting machine will have quite a small footprint: about 600M, and except if your network is intensively used, a low spec computer can be recycled to do the job.

As the machine is going to operate as a router/firewall

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