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    Proxmox GRE tunnel permanently lost connection after 1 week uptime

    Hi Folks, I have a serious problem; i'm using an external VPS with an (unbound) failover ip to make a GRE-TAP tunnel to my Proxmox server at Hetzner. I have one node with one windows guest. The tunnel worked absolutely perfect for a week, but then suddenly it quit working. I thought it was on...