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Configuring Junos OS to Extend the Default Port Address Range


By default, the upper range of a port address is 5000. You can increase the range from which the port number can be selected to decrease the probability that someone can determine your port number.

  • To configure Junos OS to extend the default port address range, include the source-port statement at the [edit system internet-options] hierarchy level:

upper-limit upper-limit is the upper limit of a source port address and can be a value from 5000 through 65,355.