Chapter 11. Securing Networks with Cisco Routers

This chapter covers the following subjects:

• Designing ACLs

• Simple Network Management Protocol

• Disabling Directed Broadcasts

This chapter addresses how Cisco IOS Software uses access control lists (ACL) to secure a network, and discusses how to configure routers so that they do not present potential vulnerabilities through services or features that might be exploited by intruders. Disabling unnecessary services helps reduce the vulnerability of your network, and this chapter identifies some of the common services and features that you should consider disabling if not in use.