Double VPN setup
I have a setup I'm having trouble with. I have a Brume sitting behind a modem (and/or router) at home. Let's call that modem/router a Flint A. Then I have another router, Flint B, in a remote location. I can set up Flint B as a VPN server (OpenVPN or Wireguard), along with DDNS, since it has a residential service (I've appropriately set up port forwarding). Then, I have a laptop connected to the Brume which runs AnyConnect/GlobalProtect (yes, this is exactly what you are thinking, no lectures please!). The purpose is to get all laptop traffic to come out of the residential service in Flint B. Traffic works fine without AnyConnect or GlobalProtect. But once I connect those and try to pull up a site, whether a VPN site or public site, the page takes forever to load or doesn't load at all. Sometimes, GlobalProtect/AnyConnect complains about timeouts. I've tried messing with MTU down to 1280, no luck... Bonus question: for redundancy, I want to set up a Puli with a SIM card and Tailscale exit node (to get around CGNAT). In this case, it would replace the Wireguard/OpenVPN server (Flint B). The question: which VPN is best (less finicky?) for this setup? And can Tailscale work at all? How do I troubleshoot these network issues? I'm a software engineer, so I'm technical, just don't know the very deep details of networking...