u/Leon_19731

Environment:

- Windows 10, WireGuard for Windows (latest)

- Server: Ubuntu 24.04, WireGuard on UDP port 54507

Problem:

WireGuard shows "Active" but handshake never completes.

Transfer always shows 0 bytes received, no handshake time.

Server-side tcpdump shows NO packets arriving from Windows

client during connection attempts.

Confirmed:

- ICMP ping to server works (~186ms)

- macOS, iOS, Android clients work fine on same server

- Issue persists on both WiFi and mobile hotspot

- Added Windows Firewall rules for UDP in/out

- Fresh reinstall as Administrator

- Kill-switch disabled

What could cause WireGuard on Windows to not send any UDP packets?