Why does the port matter? Though DoT is encrypted, an admin watching the network can see that requests are coming and going, even if it would be a struggle to see their contents because of encryption.ĭoH, however, uses the same port as all other HTTPS traffic, such as web browsing. DoT uses a dedicated port, 853, while DoH uses port 433. Though they provide similar encryption and are both encrypted, they differ in a key aspect: the port they use. It’s important to note that DNS over HTTPS is not the same as DNS over TLS (DoT). In doing so, it both improves user privacy and prevents attackers from spoofing or altering DNS traffic for malicious purposes. DNS over HTTPS (DoH), is a protocol introduced in 2018 that seeks to hide DNS queries and responses passing the traffic through an encrypted HTTPS session.
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