Your IP address is used whenever your Windows PC connects to the internet. It can reveal information about your network connection and approximate location. In some situations, privacy tools such as VPNs are expected to hide your normal public IP address, but configuration problems can cause the original IP address to become visible.
An IP leak does not necessarily mean that your computer has been hacked. It can result from DNS configuration, browser behavior, WebRTC, VPN settings, or a connection that bypasses the VPN. Checking for leaks is useful whenever you depend on a VPN or other privacy service.
Method 1: Check Your Public IP Address
The first step is to find your normal public IP address.
- Disconnect from your VPN if you are using one.
- Open a web browser.
- Search for What is my IP address.
- Note the public IPv4 address shown.
- If available, also note the IPv6 address.
- Close the browser or keep the result available for comparison.
Your public IP address is generally assigned by your internet service provider. It is different from the private IP address assigned to your Windows PC by your router.
Now reconnect to your VPN and check the public IP address again.
If the VPN is working as expected, the address displayed by the external service should normally be different from the address you saw without the VPN.
If your original public IP continues to appear, investigate the VPN configuration before assuming that your connection is protected.
Method 2: Test for DNS Leaks
DNS translates domain names into IP addresses so your computer can connect to websites and online services.
A VPN may be configured to route DNS requests through its own servers. If DNS requests instead go through your normal network provider, information about the websites you access may be exposed to the DNS provider.
To check for a DNS leak:
- Connect to your VPN.
- Open a reputable DNS leak testing service.
- Start the standard or extended test.
- Review the DNS servers reported by the test.
- Compare the results with your VPN provider’s expected DNS infrastructure.
If the results show DNS servers associated with your regular internet provider while the VPN is connected, your configuration may have a DNS leak.
The exact result depends on your VPN, network, browser, and DNS configuration.
A DNS leak does not expose the same information as directly exposing your public IP address, but it can still be relevant to privacy.
Method 3: Check for WebRTC IP Leaks
WebRTC is a browser technology used for real-time communications such as voice and video applications.
Depending on the browser and network configuration, WebRTC can sometimes expose network information that users do not expect.
To test for this:
- Connect your VPN.
- Open a reputable WebRTC leak-testing website.
- Run the available test.
- Review the detected IP addresses.
- Compare them with your expected VPN address.
Pay attention to whether an address associated with your normal network is revealed.
The exact behavior varies between browsers and configurations. Modern browsers have also changed how network information is exposed over time, so a result should be interpreted in the context of the specific browser you are using.
If WebRTC exposure is a concern, review your browser’s privacy settings and the documentation provided by your VPN service rather than changing random browser settings.
Method 4: Test IPv6 for VPN Compatibility
IPv6 can create unexpected results when a VPN handles IPv4 traffic but does not properly handle IPv6 traffic.
For example, your VPN may successfully change your IPv4 public address while your IPv6 connection remains accessible outside the VPN tunnel.
To check this:
- Connect to your VPN.
- Open a public IP-checking service.
- Check whether an IPv4 address is displayed.
- Check whether an IPv6 address is also displayed.
- Compare the results with and without the VPN.
If your normal IPv6 address appears while connected to the VPN, check whether your VPN officially supports IPv6.
Do not disable IPv6 automatically just because a test displays an IPv6 address. IPv6 is a normal networking protocol and is not itself a security problem.
If your VPN does not support IPv6, follow the VPN provider’s recommended configuration rather than making changes without understanding their effect.
Method 5: Check Your VPN Connection
A VPN can disconnect without being immediately obvious, especially if the VPN application is minimized or running in the background.
A reliable VPN application should provide a clear connection status.
Check the VPN application for:
- Connection status
- Current VPN server
- Assigned VPN IP address
- Kill switch status
- DNS protection
- IPv6 handling
- Automatic reconnection options
If your VPN supports a kill switch, consider enabling it if you need protection whenever the VPN connection drops.
A kill switch can prevent certain traffic from using the normal internet connection when the VPN becomes unavailable, depending on how the feature is implemented.
After changing the configuration, disconnect and reconnect to the VPN and repeat the IP and DNS tests.
Method 6: Check Windows Network Configuration
Incorrect network settings can sometimes contribute to unexpected connectivity or DNS behavior.
You can inspect your Windows network configuration using Command Prompt.
- Press Windows + R.
- Type
cmd. - Press Enter.
- Type:
ipconfig /all- Press Enter.
- Review the network adapters and DNS servers shown.
You may see several adapters, including Ethernet, Wi-Fi, VPN, virtual network adapters, and other interfaces.
Do not change or remove settings simply because an adapter looks unfamiliar. VPN applications, virtualization software, security applications, and Windows itself can create legitimate virtual adapters.
You can also use:
ipconfigto view basic IP information.
Remember that addresses beginning with ranges such as 192.168.x.x, 10.x.x.x, and certain other private ranges are normally local network addresses rather than your public internet address.
Method 7: Test Different Networks and Browsers
If you see unexpected results during an IP leak test, repeat the test under different conditions.
For example, test:
- With the VPN disconnected.
- With the VPN connected.
- In another browser.
- Over Wi-Fi.
- Over Ethernet, if available.
- With different VPN servers.
This can help determine whether the issue is caused by the VPN, browser, network, or a particular server.
If the original public IP appears only when using one browser, investigate that browser’s configuration.
If it appears regardless of browser but only on one VPN server, try another server and check the VPN provider’s support documentation.
Testing systematically is better than changing multiple settings at once because it makes the source of the problem easier to identify.
Method 8: Fix a Detected IP Leak
If your tests consistently show that your normal IP or DNS information is being exposed while your VPN is connected, take a structured approach.
First, update the VPN application to its latest available version.
Then:
- Disconnect the VPN.
- Close the VPN application.
- Restart Windows.
- Open the VPN application again.
- Connect to another VPN server.
- Check the public IP address.
- Perform a DNS leak test.
- Perform an IPv6 check if relevant.
- Perform a WebRTC test if browser privacy is important to you.
If the problem continues, open the VPN application’s settings and check its DNS, IPv6, kill-switch, and leak-protection options.
You can also contact the VPN provider’s support team if its service is expected to prevent the type of leak you are seeing.
Avoid downloading random “IP leak fixer” utilities from unfamiliar websites. Such programs can create additional security and privacy risks.
Conclusion
Detecting an IP address leak on Windows is relatively straightforward when you test each part of the connection separately. Start by checking your public IP address without a VPN and then compare it with the address displayed while connected to the VPN.
DNS leak testing can show whether DNS requests are going through an unexpected provider, while WebRTC testing can help identify browser-related exposure. IPv6 should also be considered if your VPN does not fully support IPv6.
If you discover a leak, check the VPN application’s configuration, update the software, try another server, and repeat the tests. Avoid making unnecessary Windows networking changes unless you understand what they do.
An IP leak test can tell you what information is visible to external services, but it cannot guarantee complete online anonymity. Your browser, websites, accounts, cookies, applications, and other tracking technologies can reveal information independently of your IP address.
FAQs
1. How can I tell if my VPN is leaking my IP address?
Check your public IP address with the VPN disconnected and then connected. If the same public address associated with your normal connection is still visible while the VPN is active, investigate the VPN configuration and repeat the test using another server.
2. What is a DNS leak?
A DNS leak occurs when DNS requests are handled by an unexpected DNS provider while you are using a VPN. This can potentially reveal information about the domains your device is requesting even when other traffic is routed through the VPN.
3. Can IPv6 cause an IP leak?
Yes, if a VPN does not properly handle IPv6 traffic. In that situation, IPv6 traffic may use the normal internet connection even though IPv4 traffic is routed through the VPN. Check your VPN provider’s documentation for IPv6 support.
4. Does an IP leak mean my computer has been hacked?
No. An IP leak usually indicates a networking, browser, or VPN configuration issue rather than proof that your computer has been compromised. If you suspect malware, perform a separate security scan with a trusted antivirus solution.
Quick Summary
- Compare your public IP address with and without your VPN connected.
- Test for DNS, WebRTC, and IPv6 leaks when relevant.
- Check your VPN’s kill switch, DNS protection, and IPv6 settings.
- Update the VPN application and retest before making major Windows network changes.