Why DNS-over-HTTPS (DoH)? — The Primer Before we get deep into why DoH makes IT admins sweat, let’s start with why it exists in the first place. Traditional DNS Is a Massive Privacy Leak Every time you visit a website, your device asks a DNS server: “Hey, what’s the IP for gimmecatsinbowties.com?” And that query goes out completely unencrypted [¹].