Windows Firewall frequently blocks the direct P2P connections Hamachi tries to establish, forcing it into relay mode.

Open a web browser, type your IP into the address bar, and log in to your router.

A direct tunnel requires to have compatible network settings. If you complete this guide and still see a blue light, your friend must also follow these exact steps .

The issue of Hamachi switching from a relayed tunnel to a direct tunnel can occur due to various reasons, including:

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.

To get that —the sign of a Direct Tunnel —follow this step-by-step fix guide. Step 1: Allow Hamachi Through the Windows Firewall