| Issue | Most Likely Fix | | :--- | :--- | | Both peers on home Wi-Fi | Enable UPnP on both routers | | One peer on mobile hotspot | Impossible (CGNAT) – use ZeroTier | | “Was direct, now relayed” | Restart Hamachi & disable IPv6 | | Corporate/school network | Can’t fix – IT blocked UDP |
If you are on a corporate or school network, the admin may block relay.logmein.com (port 443) or UDP to external IPs. hamachi relayed tunnel to direct tunnel fix
Hamachi needs inbound/outbound UDP on port (or 12974–12976 range). | Issue | Most Likely Fix | |
This tells the client to prefer that port for direct connections. Hamachi needs (default)
Hamachi needs (default).
Windows Defender Firewall is the #1 block for Direct tunnels. Even if you see "Hamachi" allowed, the rule is often broken.
Remember: A Direct tunnel isn't just a luxury—it's the difference between a usable remote connection and a frustrating digital traffic jam.