What is doh?

DNS over HTTPS (DoH) Explained

DNS over HTTPS (DoH) is a protocol for performing Domain Name System (DNS) resolution via the HTTPS protocol. In simpler terms, it encrypts the communication between your computer and the DNS server you use to translate domain names (like "example.com") into IP addresses that computers use to locate each other.

Key Benefits:

• Enhanced Privacy: <a href="https://www.wikiwhat.page/kavramlar/Privacy%20Enhancements">Privacy Enhancements</a> are a core advantage, as DoH encrypts the DNS queries, preventing eavesdropping by third parties like ISPs or malicious actors on public Wi-Fi networks. This makes it significantly harder to track your browsing activity based on DNS requests.
• Improved Security: DoH helps to mitigate against man-in-the-middle attacks and DNS spoofing, as the encrypted connection makes it difficult to tamper with DNS responses.
• Bypassing Censorship: In some regions with internet censorship, DoH can be used to circumvent DNS-based blocking, as the queries are hidden within HTTPS traffic, which is typically allowed.

How it Works:

Instead of using the traditional DNS protocol over UDP or TCP port 53, DoH sends DNS queries as HTTPS requests to a DoH-compatible server. This server then resolves the domain name and returns the IP address to the client, again over HTTPS. This entire process is encrypted.

Configuration:

Most modern web browsers (like Firefox and Chrome) and operating systems support DoH. You can typically enable DoH in your browser's settings or configure it at the operating system level using a DNS resolver that supports DoH. The server the client will use also needs to support DoH.

Considerations:

• Centralization Concerns: Some argue that DoH could lead to centralization of DNS resolution, as users may tend to rely on a few large providers offering DoH services.
• Performance: There might be a slight performance overhead compared to traditional DNS due to the encryption and HTTPS overhead, although this is often negligible.
• Trust: When using a DoH server, you are trusting that server with your DNS queries. It's important to choose a reputable and trustworthy provider.