Technical Tip: DNS over HTTPS/443 configuration

[navellano]

Description	This article describes the basic configurations for enabling DNS over HTTPS/443 (DoH) for local-out DNS queries.
Scope	FortiOS firmware 7.0 onwards.
Solution	New option is added to DNS Profile, forcing DNS over HTTPS/443 for added security. DNS over HTTPS (DoH) provides a method of performing DNS resolution over a secure HTTPS connection. The goal of the protocol is to increase user privacy, performance and security by preventing eavesdropping and manipulation of DNS data via man-in-the-middle attacks. To enable DoH DNS from GUI: Go to Network -> DNS. Enter the primary and secondary DNS server addresses. In the DNS Protocols section, enable HTTPS (TCP/443). Configure the other settings as needed. Select 'Apply'. To enable DoH DNS from the CLI: config system dns     set primary 192.168.148.6     set secondary 96.45.46.46     set protocol cleartext doh end To enable DoH on the DNS server from GUI: Go to Network -> DNS Servers. In the DNS Service on Interface section, edit an existing interface, or create a new one. Select a Mode, then DNS Filter profile. Enable DNS over HTTPS. Select 'OK'. To enable DoH on the DNS server from CLI: config system dns-server     edit "port2"         set doh enable     next end FortiGuard DNS servers (96.45.45.45 and 96.45.46.46) support DNS over TLS/HTTPS protocol. Note: When enabling DNS over HTTPS under DNS Service, make sure the GUI access (HTTPS) port is not 443. Otherwise, there will be a conflict as DNS over HTTPS also uses port 443. To check which port is being used for GUI access, run the command below:  show full | grep admin-sport Related document: DNS over TLS and HTTPS - FortiGate administration guide

[janonuevo]

This is very informative and helpful. Kudos to the Author!