About Setting Port Ranges

When you configure the H.323 registration proxy feature, you set the Q.931 port range and the dynamic H.245 port range for H.245 connections. If you configure a Q.931 port range, you must also configure a dynamic H.245 port range.

These port ranges cannot overlap because of TCP ports must be unique. The dynamic H.245 port range is used to allocate a real TCP socket, but the Q.931 port range allocates a virtual call signaling address that does not have an associated listening TCP socket.

Note:

You should choose these sockets with future Oracle® Enterprise Session Border Controller features about security in mind because future development will support performing admission control based on these port ranges. You will be able to set up filtering rules to allow only inbound packets to configured port ranges.

The following table shows how the Q.931 and dynamic H.245 port ranges work. If you set the start port of 1024 and the number of ports to 1024, you will have configured a port range that starts at 1024 and ends at 2047. So the final port in the range is the start port number added to the number of points, minus 1. Remember that you cannot overlap the Q.931 and dynamic H.245 port ranges. Notice that the higher the number of the start ports, the fewer ranges of ports you have remaining from which to choose.

Number of Ports	Start Port	n
1024	1024 * n	1-63
2048	2048 * n	1-31
4096	4096 * n	1-15
8192	8192 * n	1-7
16384	16384 * n	1-3
32768	32768 * n	1