I use GlobalProtect VPN 5.2.12-16 and Windows Subsystem for Linux (WSL) 2004.2022.1.0 on Microsoft Windows 10 Enterprise 21H1 19043.1766. WSL doesn't have access to Internet when the GlobalProtect VPN is on. How can I fix that?
https://github.com/microsoft/WSL/issues/5068 mentions that this is a bug in WSL2 and point to the following workaround https://docs.microsoft.com/en-us/windows/wsl/troubleshooting#bash-loses-network-connectivity-once-connected-to-a-vpn:
If after connecting to a VPN on Windows, bash loses network connectivity, try this workaround from within bash. This workaround will allow you to manually override the DNS resolution through /etc/resolv.conf
.
Take a note of the DNS server of the VPN from doing ipconfig.exe /all
Make a copy of the existing resolv.conf sudo cp /etc/resolv.conf /etc/resolv.conf.new
Unlink the current resolv.conf sudo unlink /etc/resolv.conf
sudo mv /etc/resolv.conf.new /etc/resolv.conf
Edit /etc/wsl.conf
and add this content to the file. (More info on this set up can be found in Advanced settings configuration)
[network]
generateResolvConf=false
Open /etc/resolv.conf
and
a. Delete the first line from the file which has a comment describing automatic generation
b. Add the DNS entry from (1) above as the very first entry in the list of DNS servers.
c. Close the file.
Once you have disconnected the VPN, you will have to revert the changes to /etc/resolv.conf
. To do this, do:
cd /etc
sudo mv resolv.conf resolv.conf.new
sudo ln -s ../run/resolvconf/resolv.conf resolv.conf
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