Q: Is "Relay (TCP)" dangerous? A: No. It is just slow. You are not hacked. But it ruins real-time games (shooters, fighters, RTS).
Q: Does Radmin VPN Relay fix work for Minecraft? A: Yes, but only if the host (server owner) fixes their UDP relay. Players connecting to a server do not need to fix their side; the server host does.
Q: My relay fix works for 10 minutes, then reverts to TCP. A: Your router’s NAT table is full. Reboot your router weekly. Also, disable "Energy Efficient Ethernet" in your network card properties.
Q: Can I just tell Radmin to disable TCP entirely? A: No. The software requires TCP as a fallback. That is the "Relay." You cannot disable it; you can only make it unnecessary by fixing UDP.
For the vast majority of users experiencing "Relay" connection issues in games like Minecraft and Terraria, disabling Local Socket works immediately.
Pros:
Cons:
| Action | How to do |
|--------|------------|
| Enable UPnP on router | Port forwarding not needed – UPnP helps UDP hole punching. |
| Allow Radmin in Firewall | Allow radmin_vpn.exe & radminvpn.sys for UDP (ports 0–65535). |
| Disable VPN/proxies | Other VPNs or proxy software block direct UDP. |
| Switch network location | Public → Private network in Windows. |
| Restart Radmin service | services.msc → Radmin VPN → Restart. |
After these: Both users restart Radmin → check status again. If still Relay (TCP), proceed.
The “TCP relay” problem is almost always UDP blockage. The only permanent fix is allowing UDP ports or using a different VPN engine (ZeroTier). Radmin VPN works best on home networks with open outbound UDP.
✅ Most reliable fix: Disable IPv6 on Radmin adapter + add firewall allow rule for UDP 50000-65000.
If your Radmin VPN connection status shows as Relay/TCP, it means the software cannot establish a direct peer-to-peer connection and is instead routing your data through an intermediate server. While this isn't technically an "error," it often results in high latency (lag) or prevents you from seeing game servers entirely. Why Relay/TCP Happens
A relay connection is a fallback mode triggered by network obstacles: radmin vpn relay tcp fix work
NAT Issues: Symmetric NAT or multiple routers between you and the internet can block direct tunneling.
Firewall Blocks: Windows Firewall or antivirus software may be obstructing Radmin's ports.
Carrier Grade NAT (CGNAT): Your Internet Service Provider (ISP) might not provide a public IP address. Step-by-Step Fixes for Direct Connection
To get back to a TCP/OUT or direct connection, follow these proven troubleshooting steps. 1. Configure Router DMZ or Port Forwarding
The most effective way to force a direct connection is to ensure your router doesn't block incoming traffic.
Enable DMZ: Log into your router settings, find the DMZ section, and enter your PC's local IP address. This places your computer outside the router's firewall for the VPN's purposes. Q: Is "Relay (TCP)" dangerous
Restart Hardware: After applying DMZ settings, restart both your router and PC to clear the network cache. 2. Manage Firewalls and Antivirus
A common cause of Relay/TCP is a local firewall blocking the Radmin VPN adapter.
Add Exceptions: Go to your Windows Firewall settings and ensure both the Radmin VPN application and the specific game you are playing are added to the "Allowed Apps" list.
Temporary Disable: To test if this is the cause, temporarily disable your antivirus or firewall. If the connection turns direct, you need to create a permanent exclusion for Radmin. 3. Refresh Radmin Services
Sometimes the internal Radmin service gets stuck in a relay state. Relay connection vs direct connection