How To Block Telnet On Cisco Router?
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1. Access the router configuration using the “configure terminal“ command.
2. Disable Telnet access to the router by entering the following command in config mode: “no ip telnet server“.
3. Verify that Telnet is disabled by entering the “show ip interface“ command. The output should include a line stating “Telnet server disabled.”
4. Save the changes to the router‘s configuration by entering the “copy running–config startup–config“ command.