Wireguard client not receiving data from 3G Router Server

Unfortunately port checking services are unreliable for UDP.
It's best to use tcpdump to determine whether the ISP allows traffic.

Also verify the following:

  • Your DDNS domain matches the one configured in the VPN client.
  • The domain name is correctly resolved to a public IP address.
  • The IP matches the address of the router's WAN interface.
  • The port in the client profile matches the VPN server port.
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