Hamachi Relayed Tunnel To — Direct Tunnel Fix

The most common cause is the Windows Firewall blocking the "Hamachi Client Tunneling Engine" Control Panel and navigate to System and Security Windows Defender Firewall Allow an app or feature through Windows Defender Firewall Change settings

Do not rely solely on the icon color. You need to verify the connection path.

If one peer switches to a less restricted network (e.g., mobile hotspot), that often forces direct tunnel.

: Explores system innovations used to maximize VPN throughput and manage varied communication characteristics between peers. Core Concepts Used by Hamachi hamachi relayed tunnel to direct tunnel fix

: Discusses how private P2P tunnels are established and maintained without central administration, which is the core goal of a "direct tunnel".

Often, the problem is temporary and can be resolved by resetting Hamachi's core components.

: Manually allow the Hamachi Client Tunneling Engine ( hamachi-2.exe ) through both Windows and third-party firewalls. Ensure it is checked for Domain, Private, and Public networks. Manual Port Forwarding : Set a static UDP port in Hamachi's Advanced Settings . The most common cause is the Windows Firewall

Select and click Properties . Click the Advanced button at the bottom right. Uncheck the box for Automatic metric .

: Search for "Allow an app through Windows Firewall" in your Start menu Find the Engine : Click "Change settings" and then "Allow another app..." Locate Hamachi : Browse to your Hamachi installation folder (usually C:\Program Files (x86)\LogMeIn Hamachi ) and select hamachi-2.exe (the tunneling engine, not just the UI) Enable All : Ensure both

If you are seeing a blue dot, try these immediate steps before moving to advanced configuration: : Explores system innovations used to maximize VPN

Aggressive third-party antivirus suites (like Avast, Kaspersky, Bitdefender, or McAfee) feature proprietary firewalls that strictly block P2P connections.

One of the most common causes of relayed tunnels is Windows Firewall blocking Hamachi’s traffic. Even if the firewall appears to be “off” or permissive, explicit rules are still beneficial.

While there are no major peer-reviewed "academic papers" exclusively dedicated to fixing a relayed tunnel in