Help: New installation but no connection

[magamess]

Hello!

I am trying to setup a private WireGuard server on my Raspberry Pi, so I can connect to my home network when I am abroad. I have installed PiVPN and followed all the steps.

I am using a QR to configure a WireGuard tunnel on my phone and my laptop, but when I activate it, I loss connection (the VPN does not work). Any thoughts? This is the router configuration. Internal Host is my Raspberry Pi IP

::::Self check ::::
:: [OK] IP forwarding is enabled
:: [OK] Iptables MASQUERADE rule set
:: [OK] WireGuard is running
:: [OK] WireGuard is enabled 
(it will automatically start on reboot)
:: [OK] WireGuard is listening on port 51820/udp

Thanks!

[magamess]

I followed all the steps from: https://docs.pivpn.io/faq/#how-do-i-troubleshoot-connection-issues

I have tried the following:

On my raspberry pi, I got the public IP as I saw with curl -s https://checkip.amazonaws.com, then ran sudo tcpdump -n -i wlan0 port 51820. While the terminal was blocked, on a different device on a different network (cellular), tried to visit on a browser https://public_ip_from_the_curl_command:51820

This is what I received in the raspberry terminal:

sudo tcpdump -n -i wlan0 port 51820 tcpdump: verbose output suppressed, use -v[v]... for full protocol decode listening on wlan0, link-type EN10MB (Ethernet), snapshot length 262144 bytes ^C 0 packets captured 0 packets received by filter 0 packets dropped by kernel

[magamess]

I called my ISP and they disabled NAT. So I can now forward IPv4 ports and all works perfectly