The primary issue is the interaction between the DNS changes the VPN connection creates (switching to corporate internal DNS) and how WSL discovers DNS settings to populate /etc/resolv.conf is flawed, this is how I fixed it for my corporate VPN solution (GlobalProtect).
Oct 20, 2016 How to Fix DNS Server Not Responding Errors Jun 17, 2020 How To Fix DNS Server Windows 10 Error-Simple Guide How To Fix DNS Server Windows 10: Potential Reasons. The symptoms can arise out of multiple reasons. One of them can be a power failure. Incorrect server address can also result in this glitch. Apart from that, there can be other issues. Issues with the router. The router settings are not configured with the respective computer or laptop
[SOLVED] DNS Problems in Windows 2008 R2 - Windows Server
Jul 14, 2020 How to Fix DNS Server Not Responding Problem (with Pictures)
Jun 17, 2009
How to Fix DNS Server Not Responding Problem (with Pictures) Mar 13, 2020 10 tips for troubleshooting DNS problems - TechRepublic Nov 24, 2010