Accessing Windows host in WSL2

Feb 14, 2024#WSL2758

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This is a guide on setting up WSL2 to access Windows host on Win11 Professional. It includes steps to find Windows host IP address, allow WSL2 access to Windows network through firewall rules, and test the connection by pinging the Windows host from WSL2.

Environment Introduction#

WSL2: Ubuntu 22.04
Windows Host: Win11 Professional Edition

Windows Host IP Address#

In WSL2, use the following command:

cat /etc/resolv.conf

Accessing Windows Host from WSL2#

By default, the Windows host firewall will block WSL2 applications from accessing the Windows network.
Solution: Add a firewall rule to allow WSL2 to access Windows.

Run PowerShell as an administrator and enter the following command:

New-NetFirewallRule -DisplayName "WSL" -Direction Inbound  -InterfaceAlias "vEthernet (WSL)"  -Action Allow

Note: You can use the ipconfig command to check the InterfaceAlias

Test if the firewall rule is successfully added.
Ping the Windows host from WSL2, if you can ping successfully, it means the rule was added successfully.

References#

https://github.com/microsoft/WSL/issues/4585