What is a DNS leak?
A DNS leak is a security flaw allowing Internet Service Provider (ISP) to trace your online activity when translating domain names into IP addresses through its DNS servers. Even if you use a VPN service, default DNS servers may expose your browsing history.
Preventing DNS leaks involves using a private DNS or hosting your own DNS servers to reroute domain name requests away from your ISP. When paired with a secure from DNS leak VPN connection, most causes of DNS leaks are avoided.
Why do DNS leaks happen?
Misconfigured VPN settings
Misconfigured VPN settings or other network software changes might reroute your requests to a public DNS server, resulting in DNS leaks
Split tunneling issues
Routing only selected traffic through a VPN server has a history of causing DNS leaks for some VPNs using split tunneling features
WebRTC leaks
WebRTC-based fingerprinting techniques can expose your IP address, compromising your attempts to prevent DNS leaks and avoid tracking
Malware
Viruses may tamper with your DNS server redirecting requests to malicious sites, tracking your online actions, or causing DNS leaks
Operating system defaults
The default settings on your operating system may cause IP address and DNS leaks by overriding your VPN connection and private DNS
DNS spoofing
By modifying DNS records, DNS spoofing may expose your online activity or other sensitive information, creating room for DNS leaks
How CometVPN’s DNS leak protection helps you
No ISP tracking
Avoid internet service provider tracking with CometVPN. Your data is fully encrypted, IP address is concealed and DNS leaks prevented with a private DNS
Encrypted DNS traffic
Your data is protected from DNS leaks, and all other attacks with CometVPN. We use military-grade AES-256 encryption implemented in all our VPN servers
Bypass Geo-restrictions
CometVPN balances protection from DNS leaks and bypassing of geo-restrictions. Change your IP address and implement the wanted private DNS to access content
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Questions & answers
How do I know if my VPN is leaking DNS?
If you are not using a private DNS or running your own DNS server, DNS leaks are likely to occur. Run a DNS leak test to determine this conclusively. DNS leak tests work by identifying the DNS servers you use.
Does CometVPN block DNS hijacking?
DNS hijacking, also known as DNS redirection, is a cyber attack where DNS settings are manipulated to redirect the victim's device to illegitimate websites. Such an attack can lead to DNS leaks, various types of fraud and phishing attempts, or infect your devices with malware.
Can a VPN cause DNS issues?
Most VPN providers override the DNS server you set up with their own. While this is done for a better encrypted VPN connection, it may cause DNS issues. All major private DNS servers are compatible with CometVPN and should not cause any issues.
Is DNS leak protection enabled by default?
Many VPN connections route your DNS queries through their own DNS servers by default. While this helps to avoid DNS leaks conveniently, it might also cause issues and reduce flexibility if you want to use your own DNS settings or server.