Step 1:

1. Connect to your router using Telnet, SSH or via console.
2. Enter the global configuration mode using the command:
   Router>enable
   Router#conf terminal
   Router(config)#

Step 2 :

Enable the router's HTTP/HTTPS server, using the following Cisco IOS commands:  

Router(config)# ip http server

Router(config)# ip http secure-server

Router(config)# ip http authentication local

Note:- HTTPS is enabled only for crypto enabled IOS images.

Step 3:

Create a user with privilege level 15.

Router(config)# username <username> privilege 15 password 0 <password>

Note:- Replace <username> and <password> with the username and password that you want to configure.

Step 4:

Configure SSH and Telnet for local login and privilege level 15:

Router(config)# line vty 0 4

Router(config-line)# privilege level 15

Router(config-line)# login local

Router(config-line)# transport input telnet

Router(config-line)# transport input telnet ssh

Router(config-line)# exit

Step 5: (Optional) Enable local logging to support the log monitoring function:  

Router(config)# logging buffered 51200 warning