WSL2 - Unable to access localhost:5000

[NEKN3X]

Please fill out the below information:

• Your Windows build number: (Type ver at a Windows Command Prompt)

Microsoft Windows [Version 10.0.18956.1000]

• What you're doing and what's happening: (Copy&paste the full set of specific command-line steps necessary to reproduce the behavior, and their output. Include screen shots if that helps demonstrate the problem.)

React front app
$ yarn start
Rails backend API
$ bundle exec rails s -b localhost -p 5000

• What's wrong / what should be happening instead:

I want to connect my rails API but I can't.
If I type IP directly I can connect the API from react.
like
$ bundle exec rails s -b 172.xx.xx.xx -p 5000
cors.rb
origins /localhost:\d+/, /172.xx.xx.xx:\d+/

curl is OK
$ curl localhost:5000/users/1
{"status":"SUCCESS", ... }

but react
GET http://localhost:5000/users/1
net::ERR_CONNECTION_REFUSED

I am sorry I can't speak English well.

[archilkarchava]

Try bundle exec rails s -b 0.0.0.0 -p 5000.
Edit: Also, if your localhost connection from wsl is unreliable I recommend you update to the latest windows 10 insider build, it will resolve a number of networking issues.

[NEKN3X]

I did bundle exec rails s -b 0.0.0.0 -p 5000.

Connected.
Thank you.

[craigloewen-msft]

Upgrading to a newer insiders build will remove the need to bind to 0.0.0.0, so I'll close this issue out as resolved! :)