Hotspot Ports Help...

Dear Everyone

I have a hotspot that is working fine. i noticed that the hotspot authentication page respond only on requests on ports 80 & 8080.

What if im using a proxy with different port ( ex: 8181 ), the authentication page will not open, so i have to remove the proxy from my browser to be able to authenticate, then put it back.

Can somebody please help me how to add new ports? and let my hotspot respond on new ports?

Thank You
Best Regards

No one have an idea?!
by example using a firewall rule or something? im trying to make it work since 2 months, any help would be too much appreciated.
Thanks