Before deploying a router, you should secure it: that is, you should do everything you can to prevent the router from being misused, either by people within your own organization or by intruders from the outside. This chapter describes the first simple steps you can take toward router security ; however, it's not a complete discussion by any means. I don't do anything more than point you in the right direction. For more security review and hints, you might want to look at some O'Reilly titles, especially Hardening Cisco Routers by Thomas Akin and Cisco Cookbook by Kevin Dooley and Ian J. Brown.