Question

Configure a named access list to only allow R1 to telnet to R2

Answer 1

To configure a named access list to only allow R1 to telnet to R2, you need to create an access list on R2 that permits the IP address of R1 to establish a telnet connection. This can be achieved by creating and applying an access control list (ACL) on R2's configuration. The ACL should include a permit statement for the specific IP address of R1 and restrict access to the telnet port.

Step-by-step explanation:

To configure a named access list to only allow R1 to telnet to R2, you need to create an access list on R2 that permits the IP address of R1 to establish a telnet connection.

You can create the access list using the following commands:

1. Access R2's configuration mode: configure terminal
2. Create an access list with a name, for example, 'TELNET-ACL': access-list 100 permit tcp host [R1 IP] any eq telnet
3. Apply the access list to the VTY lines to restrict telnet access: line vty 0 4
4. Enter the command to apply the access list: access-class 100 in
5. Exit configuration mode: exit

Make sure to replace [R1 IP] with the actual IP address of R1. This configuration will only allow R1 to telnet to R2.