Enable debug logging to see why relay TCP is forced:
Share logs with Radmin support.
You cannot beat CGNAT, so you cheat.
Why this works: ZeroTier uses UDP hole-punching that handles CGNAT better than Radmin. It effectively "fixes" the TCP relay by bypassing Radmin’s infrastructure. radmin vpn relay tcp fix work
For persistent TCP relay issues, Radmin’s protocol may be incompatible with your network. Use these instead (both support P2P): Enable debug logging to see why relay TCP is forced:
| Tool | Fixes relay problem by |
|------|------------------------|
| ZeroTier | Direct Ethernet-layer VPN, no relay fallback |
| Tailscale (with --advertise-exit-node) | UDP hole punching + DERP relay disabled | Share logs with Radmin support