E-Lab 11.2.1c - Standard ACL
Configure a standard access list for the local router Athens.
The access-list will filter traffic from the internal host at 12.0.0.201.
Athens wants to prevent a specific host, workstation A, from accessing Athens' external WAN connection through the Serial 0/0 interface.
Step 1
Activate privileged EXEC mode.
Step 2
Enter global configuration mode.
Step 3.1
Create a standard access-list 1 that denies traffic from the host at address 12.0.0.201.
Step 3.2
To allow traffic from all hosts other than 12.0.0.201, add a second line to access list 1 that permits all other traffic.
Type access-list 1 permit 0.0.0.0 255.255.255.255.
Step 4
Now enter interface configuration mode for serial 0/0 to apply the access-list.
Step 5
Apply access-list 1 to the serial interface such that filtering occurs on outbound traffic.
Step 6
Type end to exit the configuration session.
Step 7
Type show access-lists to view the access-list that was created.
Step 8
View the ip interface information for Serial 0/0 to verify that the list is being applied.