WSL2 - how to make it accessible through outher machines

1) enable wildcard listening address of the app like 0.0.0.0

ss -anpst will show you the on which address/port the app is listening to.

2) use powershell to setup portproxy to forward all the outside requests to the windows machine to land in the WSL2 system:

netsh interface portproxy add v4tov4 listenport=3000 listenaddress=0.0.0.0 connectport=3000 connectaddress=localhost

listenport and listenaddress are on the Windows side.

connectport and connectaddress are on the WSL2 side.

(for a node app the listening port (connectport) is usually 3000, check you app listening port in 1)

verify with:  netsh interface portproxy show all

3) open port 3000 on the firewall with:

netsh advfirewall firewall add rule name="WSL2 app" dir=in action=allow protocol=TCP localport=3000

verify from the windows defender firewall, advanced settings, inbound rules.

Cheers !