Progress
Installation and Configuration Guide
Version 9
for Windows
Accessing a Server Behind a Firewall
Progress allows you to use the Minimum Dynamic Server Port (-
minport
) and the Maximum Dynamic Server Port (-maxport
) server startup parameters to provide client access to a Progress server that is behind a firewall. This communication is possible only when the access to the server can be limited. You supply this limit when you specify a group of port numbers with the -minport and -maxport parameters.For example, suppose you start the following two login brokers:
A client requesting a connection from the first broker,
demosv1
, is assigned a port number in the range of 4000 to 4040. The 4000-to-4040 range limits access to the server by limiting communication to just 40 ports.The default for -
minport
is 1025 for all platforms. Ports lower than 1025 are usually reserved for system TCP and UDP. The default for -maxport
is 2000 for all platforms. Remember that some operating systems choose transient client ports in the 32768-to-65535 range. Choosing a port in this range might produce unwanted results.
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