netsh advfirewall firewall add rule name="Hamachi UDP" dir=out action=allow protocol=udp localport=12975,32976 remoteport=any program="C:\Program Files (x86)\LogMeIn Hamachi\hamachi-2.exe" Same for inbound (if required by your network). Other VPNs (OpenVPN, WireGuard, Cisco AnyConnect) can interfere. Temporarily disable them and restart Hamachi. Step 5 – Force direct tunnel (if possible) On the client that is currently relayed, try:
On command line (Windows):