Install the DNSCrypt-Proxy Plugin in OPNsense The DNS server has to support DoH in order for the DNS lookup to success. Instead of sending DNS traffic on UDP port 53, it is sent over TCP port 443 just like all other encrypted web traffic. DNS over HTTPS (DoH) is quickly becoming a popular way to encrypt DNS traffic. There are a number of ways DNS can be encrypted and there are various pros/cons to each. Lately there has been a growing desire to encrypt DNS traffic as much as possible – an attempt to escape from some of the madness of increased data collection and tracking. ISPs and other entities are able to know which sites you visit even if all of your web traffic is encrypted. With the increasing levels of tracking and data sharing/selling, a growing awareness that having DNS traffic unencrypted is not a good idea from a privacy and security standpoint. Whenever a device from your network is trying to go to a web address, it needs to determine the IP address of the website in order to access it. Historically, DNS is a service that was designed to be unencrypted.
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