WSL2 can't connect to yarpserver running on Windows native as of June 2022

[traversaro]

Both me and @FabioBergonti are not able to configure a mixed WSL2/Windows host system with a YARP network as described in https://github.com/robotology/robotology-superbuild#connect-to-a-yarp-server-on-a-windows-host-on-wsl2 . In particular, the Linux system is not able to connect to a yarpserver launched on Windows, while a Windows client can connect to a yarpserver launched on Linux.

A simpler version of this problem is that Linux can't ping the Windows host, so the issue can be related to https://github.com/microsoft/WSL/issues/4171 .

[traversaro]

I am quite sure that this configuration was working fine back in https://github.com/robotology/robotology-superbuild/pull/468 when I wrote that documentation, as for sure I tried back then.

@pattacini @Nicogene (and perhaps @sgiraz) do you have any experience with this problem?

[pattacini]

Hi @traversaro

I've just made a quick test with this scenario:

• WINDOWS
  • YARP version 3.7.0+46-20220616.6+gitdd9bc1f65.
  • Launched yarpserver --write
  • Launched yarp read /read
• WSL2
  • robotology-superbuild v2022.05.0
  • yarp where can see the server correctly 👍🏻
  • yarp write ... /read can send messages correctly 👍🏻

[traversaro]

Thanks @pattacini ! Can you also test on Linux/WSL2 if:

ping $(grep nameserver /etc/resolv.conf | awk '{print $2}')

is working? If that is working on your system (it does not work for me), I guess this may be related to firewall settings.

[pattacini]

Yep, I can confirm that the ping works smoothly.

[sgiraz]

cc @vvasco