If you do a search of the forums for PORTS LOGMEIN USES, you will find your answer by reading one or two of the threads that the search reveals.
There are TWO ports that it uses - one is changable
The port that is changable can be changed under PREFERENCES.
(DISCLAIMER: I am NOT an employee of LMI, nor do I have any financial concern in LMI. I am strictly a HAPPY USER of LMI products. I am using PC version and XP SP2. Other systems or versions may act different than described above.)