All internets require routers. Linux provides a full range of both static and dynamic routing. Various Linux distributions include the full-featured gateway daemon (gated) and the new Zebra suite of routing protocols. The configuration of both Zebra and gated are covered. Strengths and weaknesses of the RIP, RIPv2, OSPF, and BGP routing protocols offered by these packages are discussed. In addition to routing, the use of network address translation, which is available for Linux as "address masquerading," is described, and the way it is configured with iptables is covered.
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