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.
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. radmin vpn relay tcp fix work
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
status in Radmin VPN indicates that a direct peer-to-peer connection could not be established between you and another user, forcing data to go through Radmin's relay servers. This typically results in significantly higher ping (latency) and slower speeds compared to a direct "UDP/OUT" connection. Radmin Club
To fix this and restore a direct connection, follow these steps: 1. Configure Your Router (DMZ & UPnP) A Relay/TCP connection is often caused by a strict NAT (Network Address Translation) or router settings that block peer-to-peer traffic. Radmin Club Enable DMZ : In your router settings, find the DMZ (Demilitarized Zone)
section and enter your PC's local IP address. This often forces the connection to switch to "TCP/OUT" or "UDP/OUT". Enable UPnP UPnP (Universal Plug and Play)
is enabled in your router to allow Radmin to automatically open the necessary ports. Reboot Hardware In Radmin VPN , a Relay/TCP connection occurs
: After changing these settings, both you and the other user should restart your routers and Radmin VPN. 2. Firewall and Antivirus Exceptions
Firewalls often block the specific ports or traffic types Radmin needs for direct peer-to-peer communication. Radmin Club
Not able to join a friend using Radmin VPN. -not Channel type
Radmin VPN "Relay/TCP" mode occurs when firewalls, Strict NAT, or ISP restrictions prevent a direct P2P connection, leading to higher latency. Fixing this requires configuring firewall/antivirus exceptions, enabling router UPnP or DMZ, clearing registry conflicts, or requesting a public IP from the ISP. For more details, visit Radmin Club. Relay/tcp How to change back - Radmin Club
A Relay/TCP connection is established when a direct connection cannot be established. Try to log in to one of the gaming networks. Radmin Club how to change to tcp/out - Radmin Club
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:
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 Step-by-Step Port Forwarding for Radmin VPN Warning: Every
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.
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
Warning: Every router is different, but the logic is identical.
Win + R, type cmd, then ipconfig.IPv4 Address of your real network adapter (not Radmin). It will look like 192.168.1.XX or 10.0.0.XX.192.168.1.1 or 10.0.0.1 into your browser. Use your admin password.Radmin VPN DirectUDP (Do not use TCP unless desperate)33640 to 3364233640 to 33642192.168.1.100)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.
The "Fix" philosophy: We need to force UDP direct connectivity. We must kill the TCP relay.