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  • temporarily disable ufw and test again, while also verifying the routing Commented Apr 17 at 9:01
  • What is your VPN tun interface MTU? Do you allow ICMP packets both ways (outside and inside the VPN)? Commented Apr 17 at 10:20
  • 1
    Looks like the MTU is 1600 based on the OpenVPN server logs 2025-04-17 14:20:56 106.224.138.253:37117 peer info: IV_MTU=1600. I am going to guess ICMP is allowed since ping works both on the VPN and in my LAN. I can also ping my router from outside. Commented Apr 17 at 10:35
  • Out of curiosity: how do you get a static public IP on a mobile hotspot? Commented Apr 17 at 18:46
  • @tink no idea. I don't have that in my setup. Commented Jul 12 at 21:06