With new DNS HTTPS RR and SVCB records anyone should be able to run a server from Android.
Android does not allow running server on ports below 1000. With above DNS trick one should be able to host a server on non standard port of Android without funny looking URL. We don't even need a third party like pinggy as in OP's case which might be resetting connection to OPs phone.
So far I have tried to configure my local network DNS server to respond using above records but it's not working for some reason.
Do any browsers actually use this mechanism for port detection? I'm seeing plenty of HTTPS queries in my PiHole dashboard, but I'm not sure if browsers will actually connect to some high numbered port just because HTTPS told them to.
In theory we could've had this decades ago if browser respected SRV records, but alas.
Android does not allow running server on ports below 1000. With above DNS trick one should be able to host a server on non standard port of Android without funny looking URL. We don't even need a third party like pinggy as in OP's case which might be resetting connection to OPs phone.
So far I have tried to configure my local network DNS server to respond using above records but it's not working for some reason.