Q: Can my ISP see which websites I visit if I use DNS over HTTPS?

While DNS over HTTPS encrypts your domain name queries, your ISP can still see the IP addresses you connect to after the DNS lookup completes. They may be able to correlate these connections with specific websites, though this becomes more difficult when sites use content delivery networks or shared hosting. For complete privacy, you need a VPN service like ProtonVPN that encrypts all your internet traffic.

Q: Do DNS queries happen every time I visit a website?

Not necessarily. Your device and browser cache DNS results for a period specified by the domain owner, typically ranging from a few minutes to several hours. However, many websites load resources from multiple domains, triggering additional DNS lookups for each unique domain. A single webpage might generate dozens of DNS queries for advertisements, analytics, and embedded content.

Q: Are there any downsides to using encrypted DNS services?

Encrypted DNS can occasionally cause compatibility issues with certain network configurations or parental control systems. Some organizations block DNS over HTTPS traffic to maintain content filtering policies. Additionally, encrypted DNS may be slightly slower than traditional DNS due to the encryption overhead, though this difference is usually negligible in practice.

Q: Can I use multiple DNS privacy methods simultaneously?

Yes, and this often provides better protection. For example, you can configure your router to use DNS over TLS while also running a VPN service that handles DNS queries. The VPN's DNS handling would take precedence, but the router configuration provides backup protection if the VPN disconnects. Just ensure your methods are compatible and don't conflict with each other.

Q: How can I check if my DNS queries are being encrypted?

You can test your DNS setup using online tools like dnsleaktest.com or ipleak.net. These services will show which DNS servers are handling your queries and whether they're encrypted. If you're using a VPN like ProtonVPN, these tests should show the VPN provider's DNS servers rather than your ISP's servers, indicating that your queries are being properly protected.

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technicalFebruary 16, 202611 min read2,067 words

DNS Lookup: How Domain Name System Queries Expose Your Browsing

DNS lookup is the invisible process that translates domain names into IP addresses, but it also creates a detailed record of your browsing activity that can be monitored and logged.

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