How to change the port number of the Telnet server on the AR router

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The procedure for changing the port number of the Telnet server on the AR router is as follows:
The default port number of the Telnet server is 23.
You can run the telnet server port command to configure a new port number for a Telnet server to prevent attackers from accessing the server using the default port.

Other related questions:
Telnet login and authentication mode configuration method on an AR router
In the user interface view, run the authentication-mode { password | aaa } command to configure a user authentication mode.

Changing the Telnet port on the USG
The USG does not support modifying the Telnet login port. To use other ports, add a device capable of NAT on the USG.

Do AR series routers support Telnet
All AR series routers support Telnet. On AR routers earlier than V200R005C30, Telnet is enabled by default. On AR routers of V200R005C30 and later, Telnet is disabled by default. Run the telnet [ ipv6 ] server enable command to enable Telnet.

Can an AR router be logged in to over Telnet if Telnet is not enabled
The AR router cannot be loggeFor details about Telnet login moded in to over Telnet if Telnet is not enabled by running the telnet [ ipv6 ] server enable command. configuration on the router.

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