| More recent resolution: | |
| 1. cd ~/../../etc (go to etc folder in WSL). | |
| 2. echo "[network]" | sudo tee wsl.conf (Create wsl.conf file and add the first line). | |
| 3. echo "generateResolvConf = false" | sudo tee -a wsl.conf (Append wsl.conf the next line). | |
| 4. wsl --terminate Debian (Terminate WSL in Windows cmd, in case is Ubuntu not Debian). | |
| 5. cd ~/../../etc (go to etc folder in WSL). | |
| 6. sudo rm -Rf resolv.conf (Delete the resolv.conf file). | |
| 7. In windows cmd, ps or terminal with the vpn connected do: Get-NetIPInterface or ipconfig /all for get the dns primary and | |
| secondary. |
WSL 2 uses a Hyper-V Virtual Network adapter. Network connectivity works without any issue when a VPN is not in use. However when a Cisco AnyConnect VPN session is established Firewall Rules and Routes are added which breaks connectivity within the WSL 2 VM. This issue is tracked WSL/issues/4277
Below outline steps to automatically configure the Interface metric on VPN connect and update DNS settings (/etc/resolv.conf) on connect/disconnect.