Does not connect from WSL to localhost

[kshnkvn]

Windows ver: 2004 (19041.572)
WSL 2: Ubuntu 20.04

A Flask application is running in Windows, which is available and pinged. I try to send a request to it from WSL, but unsuccessfully:

kshnkvn@DESKTOP-GL13L32:/mnt/c/Users/kshnk$ telnet 127.0.0.1 5001
Trying 127.0.0.1...
telnet: Unable to connect to remote host: Connection refused

[therealkenc]

/dupe #4619.

Info here

[ghost]

Hi! We've identified this issue as a duplicate of another one that already exists in this repository. This specific instance is being closed in favor of tracking the concern over on the referenced thread.

Thanks for your report!