Hamachi Relayed Tunnel To Direct Tunnel Fix Direct
Fixing the "Relayed to Direct tunnel" issue in Hamachi is a game of elimination. Start with the IPv6 disable (fixes 60% of cases). Move to the Firewall UDP port (fixes 30%). Use the Registry force and UPnP for the remaining 10%.
Before fixing the issue, it is important to understand why it happens: hamachi relayed tunnel to direct tunnel fix