IP Leak - Geosurf proxy Glossary

What is an IP Leak?

An IP leak is a type of cybersecurity vulnerability whereby a user’s IP (Internet Protocol) address becomes visible in a situation where it should be concealed. IP leaks thwart any attempts to browse the Internet anonymously by allowing websites and Internet service providers (ISPs) to see this unique identifier. IP leaks are a serious consideration because IP addresses make it possible to determine a user’s service provider, locations, and other personal information.

What causes an IP Leak?

An IP leak can occur for a variety of different reasons.

One example of where IP leaks can happen is the use of WebRTC, a framework that allows for real-time communications between Internet users. If a user has configured their browser to use this feature but has not set up their proxy or VPN (Virtual Private Network) to block it, then this can results in their real IP address being leaked.

IP leaks can also happen as a result of a DNS (Domain Name System) leak. When a user attempts to visit a website, their browsing device issues a request to the DNS server, which then uses the domain name to fetch the IP address through DNS lookup. When a user’s proxy or VPN is unable to deal with DNS requests effectively, their IP address may be exposed.

Additionally, IP leaks can result from misconfigurations in proxy or VPN software. If a user has misconfigured the settings on their anonymous browsing application, then it is possible that some of their traffic may not be routed through the secure tunnel. As a result, the data will not be encrypted, which puts the user’s IP at risk of exposure.

How does one fix an IP Leak?

If you experience an IP leak, there are a couple of steps you can take to remedy the situation.

One is to check your proxy or VPN application configurations. Your software should be set up to direct all of your device’s traffic through the secure tunnel it provides. Features that may still cause issues, such as WebRTC, for instance, should be disabled in your browser so as to ensure anonymity when you go online.

Another solution is to perform a DNS leak test to identify potential DNS leaks. Should you encounter one, the best option is to configure your anonymous browsing software to utilize an alternative DNS server, ideally one offered by your software provider.

Due to the nature of what proxies and VPNs do, there will always be some small degree of risk when it comes to IP leaks. For this reason, it’s essential to select a high-quality proxy or VPN provider that routinely tests for such leaks, and preferably one that uses zero-log DNS servers.


In summation, an IP leak is a vulnerability that can compromise both your anonymity and security when using a proxy service to browse online. By taking the appropriate measures to configure your software correctly and disable potentially problematic browser features, you can minimize the risk of an IP leak occurring and ensure a safer, more secure online experience.