Anonymous Websocket not working, timeout

[ahimberg]

I'm trying to use devtunnels for testing from an Android device to a test server being developed on a cloud based dev machine I can't directly connect to that is running a web socket / signalR based service.

From my mobile device or a desktop machine, i just get a timeout trying to use an anonymous connection or connection with a tunnel auth header.
On the desktop machine i can get it to work if I use devtunnel connect and create a local persistent port to connect to, but there are no devtunnel commandline tools I can run on my android device to do the same thing

Is there another way to do this?
I hoped I could use devtunnel connect with a machine on my local network, and connect to it but the ports that devtunnels creates seem to only be accessible from the local host even if I try to open the port on my firewall.

side note: ngrok works without doing anything special all I did was run ngrok tcp and was able to use it from mobile or desktop

[ahimberg]

OK I set my protocol to http and was able to get messages flowing and returning an error.

Attaching to the server a bunch of exceptions about http/2 being required, which devtunnels is not supporting

[WolfspiritM]

I'm having a similar issue. The requests is stuck when connecting however once the server disconnects the client the requests does went through. It seems like the request correctly reaches the server but the response is not send back to the client until the connection is closed. Is there some buffering involved maybe? I even made the request via c# making sure to use http 1.1 so it's NOT an issue with http 2.0 as mention in other topics. The problem seems to be that devtunnels buffers the response until the connection is closed for some reason.