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Configuring and Implementing Extended Access List

Description : This lab exercise demonstrates configuring and implementing Extended Access-Lists.


IP Address Assignment Table

Device Interface IP Address Mask
R1 E0
S0

192.168.200.1
192.168.200.17

255.255.255.240
255.255.255.240
R2 E0 192.168.200.2 255.255.255.240
R3 S0 192.168.200.18 255.255.255.240


Instructions:

1. Connect to R1 and set the IP Address of Ethernet and Serial interfaces as given in the table and enable the interfaces

2. To facilitate communication between R2 and R3, enable RIP Routing Protocol on R1 and add the network for Ethernet 0 and serial 0 interfaces

3. Connect to R2 and set the IP Address of Ethernet interface as given in the table and enable the interface

4. On R2, enable RIP and add the network for Ethernet 0

5. From R2, ping R1ís Ethernet 0 interface to ensure that the connection exists

6. Connect to R3 and set the IP Address of Serial interface as given in the table and enable the interface and ping R1ís Serial 0 interface

7. Also verify that you can ping R2ís Ethernet interface from R3

8. Enter into global configuration mode of R1

9. Now create Extended Access List that accomplishes two things.

i. Allow only telnet traffic from the subnet off of R1ís Serial 0 interface to come into R1.

ii. Next, allow any traffic from R1ís Ethernet 0 subnet to travel anywhere

10. Create access list 101 to allow only telnet traffic from the 192.168.200.16 subnet. Use the keyword log to display output to the router every time this line on the access list is invoked.

11. Create access list 102 to permit all traffic from 192.168.200.0 subnet and use the keyword log.

12. To apply these access lists on the interfaces, enter into interface configuration mode for Serial 0 interface of R1 and apply access list 101 inbound and 101 outbound and access list 102 inbound for Ethernet 0 interface

Note: Please refer to the CertExams.com Network Simulator software for complete lab with commands. 

 

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