Restrict Telnet and SSH Access
You are in the process of configuring a new router. The router interfaces will connect to the following networks:
InterfaceNetworkFastEthernet0/0192.168.1.0/24FastEthernet0/1192.168.2.0/24FastEthernet0/1/0192.168.3.0/24
Only Telnet and SSH access from these three networks should be allowed.
In this lab, your task is to:
Create a standard access list number 5 using the access-list command.
Add a permit statement for each network to the access list.
Apply the access list to VTY lines 0-4 using the access-class command. Use the in direction to filter incoming traffic.
Save your changes in the startup-config file.
Select Router.
Press Enter to get started.
At the Router> prompt, type enable and press Enter.
At the Router# prompt, type config t and press Enter.
At the Router(config)# prompt, type access-list 5 permit 192.168.1.0 0.0.0.255 and press Enter.
At the Router(config)# prompt, type access-list 5 permit 192.168.2.0 0.0.0.255 and press Enter.
At the Router(config)# prompt, type access-list 5 permit 192.168.3.0 0.0.0.255 and press Enter.
At the Router(config)# prompt, type line vty 0 4 and press Enter.
At the Router(config-line)# prompt, type access-class 5 in and press Enter.
Press Ctrl + Z.
At the Router# prompt, type copy run start and press Enter.
Press Enter to begin building the configuration.