Warning: Every router is different, but the logic is identical.
192.168.1.1 or 10.0.0.1 into your browser. Use your admin password.The Test: After reboot, join your Radmin network. Ask a friend to ping you via the Radmin UI. If the ping works and the status turns green (Direct UDP), you have fixed the relay.
In Radmin VPN, a Relay/TCP connection occurs when a direct "point-to-point" link between two computers is blocked by firewalls, NAT settings, or ISP restrictions. While the connection still works, it often results in higher latency and slower speeds because traffic must pass through a relay server.
To fix this and establish a direct connection, follow these steps: 1. Adjust Firewall and Antivirus Exceptions Firewalls are the most common cause of relay connections.
Add Exceptions: Ensure Radmin VPN and your game are added to the "Allowed Apps" list in Windows Firewall. Trust the Network:
If using third-party security software (like Kaspersky or ESET), set the " Famatech Radmin VPN Ethernet Adapter " to Trusted or Private Network.
Specific Ports: Manually open TCP port 4899 and the range 17000–18000 in your firewall settings. 2. Configure Router Settings
If the firewall fix doesn't work, the issue likely lies with your router's NAT (Network Address Translation).
Port Forwarding: Log into your router and forward TCP/UDP ports 17301–17400 to your computer's local IP address.
Enable DMZ: As a temporary test, you can place your local PC in the router's DMZ (Demilitarized Zone). If both users do this, it often forces a direct connection. radmin vpn relay tcp fix work
UPnP: Ensure UPnP (Universal Plug and Play) is enabled in your router settings to help the VPN negotiate a path through the NAT. 3. Change Interface Metric
Windows sometimes prioritizes other network adapters over the Radmin VPN adapter, causing it to fail a direct handshake.
Open Control Panel > Network and Sharing Center > Change adapter settings.
Right-click Radmin VPN > Properties > IPv4 > Properties > Advanced.
Uncheck "Automatic metric" and set the Interface metric to 1. Restart Radmin VPN. 4. Troubleshoot ISP Restrictions
If many users on your network show as Relay/TCP, your internet provider may be using CGNAT (Carrier-Grade NAT), which prevents direct incoming connections.
Static/Public IP: Contacting your ISP to request a public IP address is often the only permanent fix for CGNAT-related relay issues.
DNS Change: Switching your DNS to Google (8.8.8.8) or Cloudflare (1.1.1.1) can sometimes resolve persistent "Connecting" or relay states.
"Connection failed ... did not properly respond in time" - Radmin Club Warning: Every router is different, but the logic
A Relay/TCP connection in Radmin VPN occurs when a direct connection between two computers cannot be established, often resulting in high latency (400ms+) and slow data speeds. This is typically caused by strict NAT settings, firewalls, or ISP limitations. Primary Fixes for Relay/TCP Mode
Configure DMZ Settings:Both users should log into their router settings and enable the DMZ (Demilitarized Zone) function, pointing it to their local IP address. Reboot the router and restart Radmin VPN afterward.
Open Required Ports:Ensure the port range 17000–18000 is open in your Windows Firewall and router. You can follow a Windows Firewall port guide for step-by-step instructions.
Adjust Interface Metric:Changing the priority of the Radmin VPN adapter can force a more stable connection.
Open Network Connections and find the Famatech Radmin VPN Ethernet Adapter.
Go to Properties > Internet Protocol Version 4 (TCP/IPv4) > Advanced.
Uncheck "Automatic metric" and set the "Interface metric" to 1.
Trust the Network in Security Software:Antivirus programs like Kaspersky, McAfee, or Norton may block the adapter. In your antivirus firewall settings, find the Radmin VPN adapter and set its status to "Trusted Network" or "Full Reliability". Advanced Troubleshooting Relay connection vs direct connection - Radmin Club
A Relay/TCP connection in Radmin VPN occurs when the software cannot establish a direct connection between two computers, forcing traffic through a third-party relay server. This often results in high latency (lag). 1. Adjust Firewall and Antivirus Settings Log into your router: Type 192
Security software often blocks the direct UDP traffic Radmin VPN needs, forcing it into Relay/TCP mode.
Create Exceptions: Ensure both Radmin VPN and the game/application are added to your firewall's allow list.
Check Adapter Profile: In your firewall settings (e.g., Avast, Norton, or Kaspersky), set the Famatech Radmin VPN Ethernet Adapter to a "Trusted" or "Private" network profile.
Disable Temporarily: Turn off your firewall or antivirus briefly to test if it fixes the relay status. If it does, you need better exclusion rules. 2. Optimize Network Adapter Priority
Windows might prioritize other network connections over Radmin VPN, causing it to default to a relay. Open the Network and Sharing Center via the Control Panel.
Right-click Radmin VPN > Properties > Internet Protocol Version 4 (TCP/IPv4) > Properties. Click Advanced and uncheck Automatic Metric.
Set the Interface Metric to 1 to give Radmin highest priority. 3. Router and Provider Solutions Radmin VPN - Help
Enable debug logging to see why relay TCP is forced:
Share logs with Radmin support.
To understand the fix, you must understand the problem.