Block any traffic heading into either network from any IP address

Question

starting with 43.11.x.x.

Answer 1

To block any traffic heading into either network from any IP address starting with 43.11.x.x, you would need to apply access control lists (ACLs) on the routers or firewalls that are at the edge of the networks. The specific steps to configure the ACLs may vary based on the device and its operating system, but here is a general example:

1. Access the command-line interface (CLI) of the router or firewall.
2. Identify the inbound interfaces on which you want to block the traffic. For example, if the networks are connected to interface GigabitEthernet0/0, you would need to configure ACLs on this interface.
3. Create an access control list that matches traffic from the IP range 43.11.x.x. The exact syntax may vary depending on the device, but an example ACL could be:

```
access-list 100 deny ip 43.11.0.0 0.0.255.255 any
```

This ACL denies any IP traffic from the 43.11.0.0/16 subnet to any destination IP address.
4. Apply the ACL to the inbound interface(s). For example, on interface GigabitEthernet0/0, you would use the following command:

```
interface GigabitEthernet0/0
ip access-group 100 in
```

This command applies access list 100 to the inbound traffic on this interface.

Note: Make sure to adjust the interface names and ACL numbers to match your specific network environment.

By configuring this access list, any traffic originating from IP addresses in the range 43.11.x.x (where x can be any value) will be blocked from entering the network.