→ Move away from Hamachi. Its hole punching fails with CGNAT, mobile networks, and corporate firewalls. Use ZeroTier (direct P2P via TCP relay fallback) or Tailscale (DERP relay fallback).
In Hamachi, peers can connect via two tunnel types: hamachi direct tunnel blocked
| Cause | Explanation | |-------|-------------| | | Both peers are behind symmetric NAT or restricted cone NAT | | Double NAT | ISP-level NAT + router NAT (e.g., CGNAT, mobile hotspots, some Starlink) | | Firewall blocking | Windows Defender, third-party AV, or router firewall blocks Hamachi’s UDP ports | | VPN interference | Another VPN (corporate, Proton, WireGuard) changes routing table or blocks non-VPN traffic | | Hamachi virtual adapter disabled | Network adapter turned off or driver corrupted | | IPv6 mismatch | One peer has IPv6 enabled, the other doesn’t – can interfere with direct discovery | | ISP restrictions | Some ISPs block UDP hole punching (rare but possible) | → Move away from Hamachi
When you see a "direct tunnel blocked" or "relayed tunnel" message in LogMeIn Hamachi, it means your computer cannot establish a peer-to-peer connection with another user. This usually forces the traffic through a slower relay server, resulting in high latency and connection drops. In Hamachi, peers can connect via two tunnel