.: Advanced Linux Networking :.

A router (also referred to as a gateway) is a computer that transfers data between two or more networks. For instance, a department at a large company or university is likely to have a router to link its own subnetwork with the larger network that belongs to the company or university as a whole. The company or university will then have a router to link all of its computers to the Internet. This topic is important enough that Chapter 24, Advanced Router Options, is devoted to the subject. For now, know that the Linux kernel includes several options that can influence its router operation. These are clustered as suboptions of IP: Advanced Router. Chapter 24 discusses the configuration and use of these options in more detail.