rfc7858 - Internet Engineering Task Force
datatracker.ietf.org › doc › htmlWith opportunistic privacy, a client might learn of a TLS-enabled recursive DNS resolver from an untrusted source. One possible example flow would be if the client used the DHCP DNS server option to discover the IP address of a TLS-enabled recursive and then attempted DNS over TLS on port 853. With such a discovered DNS server, the client might ...