How to Solve RTL8152B-VB-CG Adapter DNS Resolution Failures

How to Solve RTL8152B-VB-CG Adapter DNS Resolution Failures

Introduction: The RTL8152B-VB-CG adapter is a common USB Ethernet adapter used for connecting devices to the internet. However, some users encounter DNS resolution failures when using this adapter, meaning they are unable to access websites or resources by their domain names. This article will explore the potential causes of DNS resolution failures and provide a step-by-step guide on how to resolve the issue.

1. Understanding the Cause of DNS Resolution Failures:

DNS resolution failures occur when a device cannot resolve domain names (e.g., www.example.com) into their corresponding IP addresses. The problem could arise from several factors, including:

Adapter Configuration Issues: The RTL8152B-VB-CG adapter may not be properly configured or might be conflicting with other network settings. Incorrect DNS Settings: The DNS servers specified in your network settings might be incorrect or unreachable. Driver Issues: The device driver for the RTL8152B-VB-CG adapter might be outdated or incompatible. Network Connectivity Problems: There could be issues with your internet connection, preventing access to DNS servers.

2. Step-by-Step Troubleshooting and Solutions:

Step 1: Verify Network Connectivity

Before diving into DNS-specific troubleshooting, make sure your device is properly connected to the network.

Check if the adapter is connected: Ensure that your RTL8152B-VB-CG adapter is properly plugged into your computer's USB port. Test connectivity: Open a web browser and try accessing a website by IP address (e.g., try entering 8.8.8.8, which is Google’s DNS server). If you can access the website via the IP address, it confirms that the issue is with DNS resolution.

Step 2: Restart Your Router and Computer

Network issues, including DNS resolution problems, can sometimes be resolved by simply restarting your router and computer.

Turn off your router and wait for 10-15 seconds before turning it back on. Restart your computer to refresh the network connections. Check if the DNS resolution issue is resolved.

Step 3: Check Your DNS Settings

Incorrect DNS settings are a common cause of DNS resolution failures.

Open the network settings: On Windows: Go to "Control Panel" > "Network and Sharing Center" > "Change adapter settings". Right-click on the RTL8152B-VB-CG network connection and select "Properties". Select "Internet Protocol Version 4 (TCP/IPv4)" and click on "Properties". Set DNS to Automatic: Ensure that "Obtain DNS server address automatically" is selected. This will allow your network to automatically receive DNS settings from your router. Manually Set DNS Servers (Optional): If you prefer to manually configure your DNS, set it to a reliable public DNS service. For example: Google DNS: Primary DNS: 8.8.8.8, Secondary DNS: 8.8.4.4 Cloudflare DNS: Primary DNS: 1.1.1.1, Secondary DNS: 1.0.0.1 Save Changes and close the settings window.

Step 4: Update the RTL8152B-VB-CG Adapter Driver

An outdated or incompatible driver can cause DNS resolution issues. To ensure the driver is up-to-date:

Open the "Device Manager" on Windows (press Windows + X and select "Device Manager"). Find "Network adapters" and locate the RTL8152B-VB-CG adapter. Right-click on the adapter and select "Update Driver". Choose "Search automatically for updated driver software" to let Windows search for the latest driver. If an update is available, follow the on-screen instructions to install it. After updating the driver, restart your computer and check if the DNS resolution failure persists.

Step 5: Reset TCP/IP Stack

If the problem still persists, you can try resetting the TCP/IP stack, which can fix many network-related issues, including DNS problems.

Open Command Prompt with administrative privileges. To do this, press Windows + X, then select "Command Prompt (Admin)" or "Windows Power Shell (Admin)". In the Command Prompt window, type the following command and press Enter: netsh int ip reset Restart your computer.

Step 6: Test DNS Resolution Again

After completing the previous steps, it’s time to test if the DNS resolution issue has been fixed.

Open your web browser and try to access a website by domain name (e.g., www.google.com). If the site loads without issues, the problem has been resolved.

Conclusion:

DNS resolution failures on the RTL8152B-VB-CG adapter are typically caused by incorrect DNS settings, driver issues, or network connectivity problems. By following the above troubleshooting steps—verifying your network connection, checking DNS settings, updating drivers, resetting the TCP/IP stack, and testing again—you should be able to resolve the DNS issues.

If the problem continues after following all these steps, it might indicate a hardware fault with the RTL8152B-VB-CG adapter, in which case replacing the adapter may be necessary.