Web apps from WSL2 not accessible from other devices in same LAN

[PoProstuWitold]

Windows Version

Microsoft Windows [Version 10.0.22631.4602]

WSL Version

2.3.26.0

Are you using WSL 1 or WSL 2?

• WSL 2
• WSL 1

Kernel Version

5.15.167.4-1

Distro Version

Ubuntu 24.04

Other Software

Windows 11 Education,

My .wslconfig:

[wsl2]
memory=8GB
networkingMode=mirrored
defaultVhdSize=256GB
autoProxy=true
dnsTunneling=true
firewall=true

[experimental]
autoMemoryReclaim=gradual
hostAddressLoopback=true

Repro Steps

Run following command from this issue in elevated prompt and then launch some web app (in my case simple Node.js server running on port 3005).

A safer alternative is to Only allow connection to wsl in a Trusted (Private) network:

New-NetFirewallHyperVRule `

-DisplayName 'Allow All Inbound Traffic to WSL in Private Network' `

-Name 'WSL Rule' `

-Profiles Private `

-Direction Inbound `

-Action Allow `

-VMCreatorId '{40E0AC32-46A5-438A-A0B2-2B479E8F2E90}' `

-Enabled True

This would block connection to wsl in a public (or untrusted) network, which is good.

In case you want to delete the rule, run:

Remove-NetFirewallHyperVRule -Name 'WSL Rule'

Originally posted by @tusharsnx in #10769

Expected Behavior

Web app is accessible on other LAN devices at WSL2_IPv4:PORT

Actual Behavior

Web app is only accesible on host machine via localhost:PORT and WSL2_IPv4:PORT

Diagnostic Logs

WslLogs-2024-12-23_16-15-20.zip

[PoProstuWitold]

It was working last couple of days and today suddenly stopped. No idea why

[github-actions]

View similar issues

Please view the issues below to see if they solve your problem, and if the issue describes your problem please consider closing this one and thumbs upping the other issue to help us prioritize it!

Open similar issues:

• Mirrored networking IPv6 localhost (and localhost addresses) and hostAddressLoopback (for assigned addresses) not working from host (WSL2) (#10803), similarity score: 0.78

Closed similar issues:

• Some apps in WSL are inaccessible from the host OS while others are accessible on the same ports (#8866), similarity score: 0.80
• Remote device unreachable in WSL2 when internet connection sharing is enabled (#8428), similarity score: 0.78
• WSL mirrored network Docker container cannot access Windows service (#10926), similarity score: 0.78
• Cant access web app hosted on WSL 2 (#5368), similarity score: 0.78

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Diagnostic information

.wslconfig found
Detected appx version: 2.3.26.0