How to configure Passwords to secure Cisco Router

How to password protect Console Port

To configure the console password, follow these steps

Router>enable

Router#configure terminal

Router(config)#line console 0

Router(config-line)#password cisco

Router(config-line)#login

Router(config-line)#end

Router#

How to password protect Auxilary (AUX Port) Port

To configure the auxilary password, follow these steps

Router>enable

Router#configure terminal

Router(config)#line aux 0

Router(config-line)#password cisco

Router(config-line)#login

Router(config-line)#end

Router#

How to password protect VTY Ports (Telnet Ports)

Configuration the VTY password is very similar to doing the Console and Aux ones. The only difference is that there are 5 VTY virtual ports, which are named 0, 1, 2, 3, and 4. You can use the shortcut 0 4 (a zera, a space, and 4) to set 5 passwords at the same time. To configure the VTY password, follow these steps

Router>enable

Router#configure terminal

Router(config)#line vty 0 4

Router(config-line)#password cisco

Router(config-line)#login

Router(config-line)#end

Router#

How to password protect Privileged mode

Enable password is the old form of the password for "Privileged mode". Here the password is stored un-encrypted.

Router>enable

Router#configure terminal

Router(config)#enable password cisco

Router(config)#end

Router#

Enable Secret provides better security since password is kept encrypted.

Router>enable

Router#configure terminal

Router(config)#enable secret cisco

Router(config)#end

Router#