Enable or Disable Telnet service

The Telnet service is enabled by default. Disabling Telnet service forcibly disconnects all Telnet sessions running on a device.

1. In privileged EXEC mode, enter global configuration mode.
   

   device# configure terminal

2. Disable Telnet service on the device.
   

   device(config)# telnet server use-vrf ?
   Possible completions:
     <VRF Name> Provide the vrf (mgmt-vrf,default-vrf or <user defined vrf>) on which to start/stop telnet server
   device# telnet server use-vrf red shutdown

   All Telnet sessions including any currently active sessions are immediately terminated, and cannot be re-established until the service is re-enabled.
3. Enable Telnet service on the device.
   

   device(config)# no telnet server use-vrf red shutdown

   

   Note

   The shutdown option for a given VRF is displayed only when the Telnet server was configured and then shutdown on that VRF. Otherwise, the VRF name and shutdown option are not displayed for the no form of the command.