Use Case: You want to allow incoming video conferencing to be initiated from a restricted range of outside IP addresses (132.177.88.2 to 132.177.88.254). In the example, connections for CU-SeeMe (an Internet video-conferencing client) are allowed only from a specified range of external IP addresses.
Solution: Perform the following tasks to complete the configuration:
1. Go to the Networking > Address Management page to create an address object with the range 132.177.88.2 to 132.177.88.254 called “OutsideNetwork” and a host address object with the IP 192.168.75.110 called “InternalIP.”
2. Go to the Firewall > NAT > Port Forwarding page to create a port forwarding rule as follows.
3. Go to the Firewall > Access Control > ACL Rules page and create the ACL rule as described below.