Hamachi Relayed Tunnel to Direct Tunnel Fix

If you see "Symmetric NAT": You cannot fix this on your end. You must:

  • Create inbound/outbound rules to allow Hamachi (hamachi-2.exe / Hamachi Client)
  • Allow UDP 12975 for both private and public networks.

Fix: Hamachi relayed tunnel → direct tunnel

If Hamachi shows a relayed (yellow) tunnel but you want a direct (green) tunnel between two peers, follow these steps — apply on both machines:

If you want, tell me the OS and whether either side is behind a router or mobile/carrier network and I’ll give exact firewall/port-forward steps.

How to Fix Hamachi Relayed Tunnel and Restore a Direct Connection If you see a

Step 3: The Nuclear Option – Manual Port Forwarding

This is the most reliable fix. You are telling your router: “Let UDP traffic on port 12975 through to my PC.”

Create a Port Forwarding Rule:

  • Open Command Prompt as Administrator.
  • Run netsh advfirewall firewall add rule name="Hamachi UDP" protocol=UDP dir=in action=allow.
  • Run netsh advfirewall firewall add rule name="Hamachi TCP" protocol=TCP dir=in action=allow.