4.2. The Basics
There are some basic steps that need to be taken with any router to help increase network security. Not all of these steps will be possible in every environment, but as you develop a security strategy for your network, you can incorporate the options that are appropriate for your security needs.
Keep in mind that edge routers have at least two interfaces on them. Many times a network administrator will tighten down the external interface, leaving the internal interface wide open. If someone does manage to invade the network, he or she can use internal servers to launch attacks against other networks. If the internal interface is locked down to the same degree as the external interface on the router, it increases the chances of ...
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