CUSeeMe and Diablo) require specific port number translations, access to a range of port numbers, or no port number translation at all. The router can be configured for these types of applications using the Configure NAPT for Special Ap[plication]s submenu which is further described below.
As with NAT, defining static NAPT entries negates the security inherent in the NAPT process. However, only the specific port on the computer associated with the Static NAPT entry is accessible to users outside your network. In any case, whenever Static assignments are used, we highly recommend using alternative security measures such as filters and/or security features in the application software.
Setting Local IP Addresses
When implementing NAT and thus creating a private network that is isolated from the Internet, you can assign any IP addresses to host computers without problems. However, the Internet Assigned Numbers Authority (IANA) has reserved the following three blocks of IP Addresses specifically for private networks:
Class | Beginning Address | Ending Address |
A | 10.0.0.0 | 10.255.255.255 |
B | 172.16.0.0 | 172.31.255.255 |
C | 192.168.0.0 | 192.168.255.255 |
It is recommended that you choose local IP addresses for use with NAT from the private network IP addresses in the above list. For more information on address assignment, refer to RFC 1597, Address Allocation for Private Internets and RFC 1466, Guidelines for Management of IP Address Space.
84 | Configuration and |
Management
