Port Number Assignments

Port numbers enable IP packets to be sent to a particular process on a computer that is connected to the Internet. Some port numbers are permanently assigned; for example, e-mail data under SMTP goes to port number 25. A process such as a Telnet session receives a temporary port number when it starts. The data for that Telnet session goes to newly assigned port number, and the port number goes out of use when the telnet session ends.

A total of 65,535 port numbers are available for use.

Some port numbers in NetWare^® 6 can be reasssigned from one net service to another. Others cannot be reassigned. When adding or removing products or services from your NetWare 6 installation, or when making new port number assignments, refer to the following table, which indicates default port assignments and notes which ports can be reassigned and which cannot.

The symbols used in the table indicate the following:

= The port is configurable

= The port is not configurable

= Dependent on a subsystem

= Availability and dependency cannot be determined

Table 19. Port Assignments and Availability Status, Listed by Product