If you are using LogMeIn Hamachi to play games with friends or access files, you may encounter a Relayed Tunnel (indicated by a blue dot) instead of a Direct Tunnel (green dot).
Carrier-Grade NAT (CGNAT) kills UDP hole punching. However, Hamachi supports . hamachi relayed tunnel to direct tunnel fix
Before clicking random buttons, diagnose the cause. There are three primary reasons Hamachi refuses to establish a direct tunnel. If you are using LogMeIn Hamachi to play