I had 8 IPs in a hetzner server years ago. One IP had an iptables rule to accept openvpn on any port. My openvpn config was a long list of commonly accepted po

I had 8 IPs in a hetzner server years ago. One IP had an iptables rule to accept openvpn on any port. My openvpn config was a long list of commonly accepted ports on either tcp or udp. Startup would take a while but the number of times it worked was amazing.