Find out if you are affected by DNS LeaksMay 19, 2015 – 4:38 AM
Whenever you use anonymity or privacy solutions to protect your Internet traffic from being snooped on or to bypass censorship and location-based restrictions, you need to make sure data about your actual location in the world or underlying system does not leak.
A basic recent example is WebRTC, a new technology that most modern browsers support. Websites and services may use WebRTC to find out about IP addresses of your computer when enabled even if you use a VPN service.
Computers use the DNS system to translate domain names to IP addresses. When you enter a domain name in the browser, DNS is used to look up the corresponding IP address to establish the connection.
The DNS server of the Internet Service Provider is used most of the time but it can be changed to third-party DNS providers like OpenDNS or Google DNS which promise faster look ups and may offer advanced features such as filtering of malicious sites.
DNS Leaks occur when look ups are made using the DNS server of the ISP when you are connected to a virtual private network or other anonymity and privacy solutions.