Router(config)# no cdp run

Router(config)# no service config Router(config)# no ip source-route Router(config)# no ip subnet-zero . The following command disables a router interface. Router(config-if)# shutdown Secure each and every active interface on the router from Smurf attacks, ad-hoc routing and access-list queries with the following commands. Router(config-if)# no ip directed-broadcast Router(config-if)# no ip proxy-arp Router(config-if)# no ip unreachables . Configure the console line () and the virtual terminal lines () on the router to time out a session, to require a password at login and to allow only telnet traffic. If the auxiliary line () is not needed, then it should be disabled. Use the following line configuration commands to configure the lines. Router(config)# line con 0 Router(config-line)# exec-timeout 5 0 Router(config-line)# login Router(config-line)# transport input telnet Router(config)# line aux 0
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