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https://docs.microsoft.com/windows/wsl
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mDNS does not work with mirrored network mode #11852

Open lprobsth opened 3 months ago

lprobsth commented 3 months ago

Windows Version

Microsoft Windows [Version 10.0.22631.3880]

WSL Version

2.2.4.0

Are you using WSL 1 or WSL 2?

Kernel Version

5.15.153.1-2

Distro Version

Ubuntu 22.04

Other Software

No response

Repro Steps

networkingMode=mirrored

* Ping a device in the same network as the computer with its local hostname:

ping server.local


### Expected Behavior

WSL2 should correctly resolve the local / mDNS hostname to the correct IP address:

$ ping server.local PING 192.168.178.53 (192.168.178.53) 56(84) bytes of data. 64 bytes from 192.168.178.53: icmp_seq=1 ttl=64 time=3.98 ms 64 bytes from 192.168.178.53: icmp_seq=2 ttl=64 time=2.20 ms 64 bytes from 192.168.178.53: icmp_seq=3 ttl=64 time=2.81 ms


### Actual Behavior

The mDNS hostname is not resolved:

ping: server.local: Name or service not known



### Diagnostic Logs

[WslLogs-2024-07-29_18-57-01.zip](https://github.com/user-attachments/files/16416517/WslLogs-2024-07-29_18-57-01.zip)
github-actions[bot] commented 3 months ago

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Diagnostic information 
.wslconfig found
Detected appx version: 2.2.4.0

Revono commented 2 months ago

Same issue here WSL2 Ubuntu

Emaro commented 2 months ago

I have the same issue. A fix would be appreciated.

CatalinFetoiu commented 2 months ago

thanks for reporting the issue

we have updated the docs to include details about how to resolve .local names in WSL. Please refer to https://learn.microsoft.com/en-us/windows/wsl/troubleshooting#resolve-local-names-in-wsl

let us know if you have any questions

lprobsth commented 2 months ago

I tried the configuration with libnss-mdns and nsswitch.conf from the docs but it does not work. Is there something else I can provide?

CatalinFetoiu commented 2 months ago

@lprobsth thanks for following up please make sure you are using latest WSL build (2.3.17) I recommend also confirming that mirrored mode was successfully enabled - you can do this by running "wslinfo --networking-mode" in your distro

if you still encounter issues after confirming the above, please collect networking logs using instructions at https://github.com/microsoft/WSL/blob/master/CONTRIBUTING.md#collect-wsl-logs-for-networking-issues

lprobsth commented 2 months ago

I have installed WSL build 2.3.17. The problem seems to persist.

Here is the log file. The networking log script did not create an archive - so I zipped the output from the log directory. I hope this is correct.

WslNetworkingLogs-2024-08-22_16-09-18.zip

github-actions[bot] commented 2 months ago
Diagnostic information ``` .wslconfig found Detected appx version: 2.3.17.0 optional-components.txt not found ```
CatalinFetoiu commented 2 months ago

@lprobsth thanks

the logs don't show mdns traffic being sent by Linux

could you please collect and share the output of "sudo strace ping server.local" ? that might give us a hint on why no mdns requests are sent