Getting VCDS (Vag-Com Diagnostic System) to communicate properly through your Avast firewall can be tricky. This guide provides a clear solution to ensure your diagnostic software connects seamlessly. Many users struggle with empty server lists or connection issues, often overlooking firewall configurations. Properly configuring both your Windows Firewall and Avast Firewall is crucial for a stable VCDS connection.
Opening Ports in Windows Firewall for VCDS
First, you need to allow specific applications and ports through your Windows Firewall. This involves creating inbound and outbound rules.
- For UDK.exe (32-bit): Navigate to
C:Program Files (x86)SteamsteamappscommonVisceraBinariesWin32UDK.exewithin the firewall settings. Create inbound and outbound rules for this executable. - For UDK.exe (64-bit): The path is
C:Program Files (x86)SteamsteamappscommonVisceraBinariesWin64UDK.exe. Create inbound and outbound rules for this executable as well. Note that not all systems support both 32 and 64-bit versions. - For Steam.exe: Locate
C:Program Files (x86)SteamSteam.exeand create inbound and outbound rules. This allows VCDS to communicate with Steam if necessary. Your installation path might differ slightly depending on your system configuration.
Important: Ensure both “send” and “receive” data permissions are enabled for each of these applications in your firewall. By default, “receive data” might be disabled.
Configuring Avast Firewall for VCDS
After configuring Windows Firewall, you need to allow the same applications and ports through Avast Firewall.
- Add Exceptions: Open Avast and navigate to the firewall settings. Add
UDK.exe(both 32-bit and 64-bit versions if applicable) andSteam.exeas application exceptions. - Open Port 7777: Create a rule in Avast Firewall to allow traffic on port 7777. This is crucial for VCDS communication. Ensure both inbound and outbound connections are allowed for this port.
Port Forwarding Your Router
In addition to firewall configurations, you need to forward port 7777 in your router. This allows external connections to reach your computer.
- Access Router Settings: Access your router’s configuration page, usually by typing
192.168.1.1or192.168.0.1in your web browser. Refer to your router’s documentation for specific instructions. - Forward Port 7777: Find the port forwarding section and create a new rule to forward TCP and UDP traffic on port 7777 to your computer’s static IP address.
Using a Static IP Address
A static IP address is recommended for consistent connectivity. This prevents your IP address from changing, which can disrupt port forwarding.
- Assign Static IP: Access your network settings and configure your computer to use a static IPv4 address within your local network.
By following these steps, you should be able to successfully allow VCDS through your Avast Firewall and establish a stable connection. Remember to consult your router’s documentation for specific port forwarding instructions and Avast’s help resources for detailed firewall configuration. Correctly configuring both firewalls and your router ensures a smooth and reliable VCDS experience.
