DNS over HTTPS definition

DNS over HTTPS

(also DoH)

DNS over HTTPS is a comparatively recent protocol that encrypts domain name system communication by routing DNS requests through an encrypted session of HTTPS. DNS over HTTPS (DoH) is working to protect users’ privacy online by making DNS requests invisible to others. DoH operates in a manner that is analogous to that of DNS. However, HTTPS sessions maintain the requests and reduce the amount of information traded throughout searches. Web browsers such as Microsoft Edge, Mozilla Firefox, and Google Chrome all have the capacity to use encrypted DoH with the intention of enhancing users’ data security and privacy.

Benefits

Hiding online activity. This is done by using a secure DNS service and encrypting all related traffic. Whenever a user enters a domain name into a browser, it makes a DNS query to transform the domain name into an IP address.
Preventing DNS spoofing and man-in-the-middle attacks. If a browser and DNS server are in an encrypted session, then a malicious third party cannot manipulate the request results and direct the user to a fake website.
Improving data security and privacy. If you set up DoH correctly, you will be able to increase data privacy and security in your organization.
Testing. You can test how DoH connects to your networks in advance and fix any problems related to it before it becomes standard.

Limitations

Admins unfamiliar with DoH or comparable protocols can generate false-negative security alerts and stop queries.
If the DNS traffic filtering solution does not function as expected or interact with DoH, the DoH will be completely ineffective.
To provide security and network data, it circumvents any DNS filtering your network may use.