Title: Router Access
List Configuration
Description: Configure
according to a given set of instructions.
Instructions:
1. Enter global configuration mode.
2. Define access list with the
following conditions: a. IP 192.12.10.3 should be able to access
hosts connected to R3. b. All hosts on the subnet as Bret should not
be able to access hosts connected to R3. c. Permit all other
communications.
3. Enter interface configuration
mode for serial 0.
4. Apply the access list to
interface 0.
5. Exit interface configuration
mode.
6. Exit global configuration mode.

R3>enable
R3#configure terminal
R3(config)#access-list 56 permit 192.12.10.3
R3(config)#access-list 56 deny 192.12.10.0 0.0.0.255
R3(config)#access-list 56 permit any
R3(config)#interface serial 0
R3(config-if)#ip access-group 56 in
R3(config-if)#exit
R3(config)#exit