Reference: http://eng-tips.com/viewthread.cfm?qid=284511

The FLEXNet Server(lmgrd) listens to 28000 by default and opens a dynamic port for vendor daemon, in this case, ugslmd.exe.

To set the second port to a fixed value, such as 28001, change this line of your license file:

VENDOR ugslmd 

to 

VENDOR ugslmd PORT=28001

then open port 28000 and 28001 in your firewall rules.