: Explores system innovations used to maximize VPN throughput and manage varied communication characteristics between peers. Core Concepts Used by Hamachi
The following steps cover the most common fixes to achieve a Direct Tunnel (green dot): 1. Allow Hamachi Through Windows Firewall
What are you using? (e.g., TP-Link, Netgear, ASUS)
First, a quick 101. Hamachi uses three types of tunnels: hamachi relayed tunnel to direct tunnel fix
Right-click the network adapter and select Properties .
Press Windows Key + R , type ncpa.cpl , and hit to open Network Connections.
Ensure both the and Public checkboxes are checked next to it. : Explores system innovations used to maximize VPN
Both users must apply these fixes; if your friend has a closed NAT, you will still see a relayed tunnel.
Some older versions of Hamachi let you force direct tunnels via configuration.
Windows Firewall often flags Hamachi traffic as public and restricts direct peer communication. Press Win + R , type control firewall.cpl , and press . Ensure both the and Public checkboxes are checked next to it
Locate the , NAT , or Virtual Server settings. Create a new port forwarding rule for UDP using port 12975 . Create a second rule for TCP using port 12989 .
Before diving into solutions, it's crucial to understand what these terms mean. When you connect to another computer via Hamachi, the software attempts to establish a (represented by a green dot). In this ideal scenario, Hamachi is able to create a peer-to-peer (P2P) connection between the two computers using a technique similar to UDP hole punching. Data travels directly between the two machines, resulting in the fastest possible speeds and lowest latency for gaming, file sharing, or remote access.
Suddenly, your game lags, your file transfer crawls, and your VoIP call sounds like a robot dying of a cold. Why does this happen, and more importantly, how do you force a direct tunnel?
The following fixes are arranged from the simplest, most common solutions to more advanced techniques. Work your way down this list until the peer status indicator changes from blue to green.
To help pinpoint why your connection is still lagging, let me know: Are you or your friend using a ? What game or application are you trying to host?