Issue

Hello. I'm hosting a basic service on port 52001 with localtunnel. It's not HTTP, just a very simple server that kind of functions like a chat server.
I'm attempting to telnet into this service, but each time it refuses my connection:

david@the-swindleplex ~> telnet -K [url-redacted].loca.lt 52001
Trying 193.34.76.44...
telnet: Unable to connect to remote host: Connection refused

Environment Information

Running Kubuntu Linux 25.04, my shell is fish

Let me know if you need any more info. I'm also having another issue, which I've opened along with this one.