What is a DNS leak?
If not configured correctly or other issues arise, your VPN sometimes can fail to protect your DNS queries even if the rest of your traffic is hidden. It’s called a “DNS leak”. If it occurs, some entities, such as your ISP or DNS server operator can see your which websites you’re visiting and what apps using.
DNS affects almost everything you’re doing online. As it’s the internet’s address book, anything you’re doing on the internet requires your browser or app to find the way to their server, which is identified with a DNS. The device you’re browsing from is sending queries to a DNS server, which sends back directions how to get there. It can be a significant privacy and security risk.