Command
Login
Use
Enables authentication for console connections to router. Contrary to what it may sound like, the no login command will actually disable authentication to the console port on the router. This means that anyone will be able to access the router without having to provide a password.
Syntax
Router(config-line)#login
Example
In this example, login is enabled for console access on R2. Notice that a password is also set before using the login command.
R2#conf t Enter configuration commands, one per line. End with CNTL/Z. R2(config)# R2(config)#line con 0 R2(config-line)#password cisco R2(config-line)#login
The configuration for the console port is shown with login enabled.
R2(config-line)#do show run | sec con Building configuration… Current configuration : 1460 bytes control-plane line con 0 exec-timeout 15 50 privilege level 15 password cisco logging synchronous login
If a password is not set before using login, a message is displayed notifying that a password needs to be set before login becomes active.
R2(config-line)#login % Login disabled on line 0, until ‘password’ is set