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TechRepublic: Installing and configuring a Linux gateway

Oct 21, 2000, 17:07 (0 Talkback[s])
(Other stories by Jim McIntyre)

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"A gateway computer provides a local network with access to another network or to the Internet. Linux is easily configured for use as a low-cost, dependable gateway. This Daily Drill Down details a step-by-step process for configuring a Linux server for use as a gateway. It will not cover network security or the procedures for installing networking hardware for use with Linux."

"To set up this gateway, you'll need a Linux server with IP forwarding enabled in the kernel, a desktop computer running any operating system, three Linux-compatible network interface cards (NICs), and a hub or a crossover cable. You should consult the hardware compatibility guide on your Linux vendor's Web site (or check the Linux Hardware Compatibility Site) to confirm that the network interface cards you select are compatible."

"There are five steps in configuring a network to work with a Linux gateway:

  1. Enable IP forwarding in the Linux kernel on the gateway computer.
  2. Configure the gateway computer.
  3. Configure IP masquerading on the gateway.
  4. Configure the host computer(s).
  5. Test the network."
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