I’m trying to secure a WebDAV server behind Cloudflare using Google OAuth. This works great in a web browser, but I need our users to natively mount the WebDAV share to their local Mac/Windows/Linux desktops as a mounted network volume, and I haven’t figured out a way to accomplish this.

I’m hoping there might be some way to first require authentication in a browser window, store that authenticated user’s IP address “somewhere on Cloudflare”, then continue to allow https access from their IP through other connection means, including a secondary browser that hasn’t also been explicitly authenticated, or more to the point - a native OS mount request of the https volume. The origin server also requires it’s own Digest authentication, so once I’ve verified a particular IP address is a valid user, I’m willing to allow them to direct-authenticate to the server.

Anyone have any thoughts on how do this? If not possible through Cloudflare, I’ll gladly take an alternate solution that enables 2FA for the native OS mount mechanism. It just has to be cross platform, and allow a proper network volume mounted to the user’s desktop. Google OAuth is preferred, but any 2FA solution from the desktop (not a browser) will do the trick.

Thanks in advance!