config dosyasina -mport 32323 gibi manuel girebilirsiniz.
Ya da dahilide 3333 ü aynen burakıp, routerdaki port yönlendirmede external portu degistirebilirsiniz.
Örneğin dışarıdan 32323e gelen istekleri 3333e yondendirerek.
EDIT: Aslinda default bıraktıgınızda bir riski yok, cunku readonly modda oluyor. -mport dediginizde full control vermiş oluyorsunuz.Açıklamadan;
"-mport   remote monitoring/management port. Default value is -3333 (read-only mode), specify "-mport 0" to disable remote monitoring/management feature.
   Specify negative value to enable monitoring (get statistics) but disable management (restart, uploading files), for example, "-mport -3333" enables port 3333 for remote monitoring, but remote management will be blocked.
   You can also use your web browser to see current miner state, for example, type "localhost:3333" in web browser.
   Warning: use negative option value or disable remote management entirely if you think that you can be attacked via this port!
   By default, miner will accept connections on specified port on all network adapters, but you can select desired network interface directly, for example, "-mport 127.0.0.1:3333" opens port on localhost only."

ozetle;

-mport 0 => disable eder.
-mport 3333 => full control
-mport -3333 => sadece monitoring, default deger de bu zaten.