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What is a DNS leak?

When most of us go online, we don’t actually know what goes behind the scenes and who has access to what information. Even if you’re worried about your privacy and use tools to protect it, an unreliable or malfunctioning VPN app can leave your DNS queries visible to your ISP. This is known as a DNS leak.

Whoever runs your DNS server can make a log and track every single website and app you use. That means your ISP can collect your online browsing habits. Why would they want to do that?

  • It provides a source of income for your ISP.
  • Data is easily collected and sold to marketing companies for a pretty penny.
  • Companies then use this information for targeted ads and other marketing strategies to promote their brand.

It’s kind of like the saying two can keep a secret if one of them is dead. Even if your information is not sold for malicious intent, that doesn’t mean that it won’t fall into the hands of predators.