Unable to join self hosted server

[stemy2]

Hello,

I just installed a self hosted relay, but the simplex app is unable to join it. The address is the right one and my phone is actually able to access to others services from my server.

[CamelT0E]

Which ports do you use?
If the ports are changed, write them in the URL at the back.

[stemy2]

It uses the port 5223, and my server says the port is inaccessible.

The app log