DNS.Over.HTTPS

description-logo Description

This indicates an attempt to use the DNS over HTTPS (DoH) protocol.
DNS over HTTPS is a protocol which performs Domain Name System resolution via the HTTPS protocol. The goal of the protocol is to increase user privacy, security and performance.
Note: This signature requires "deep-inspection" in FortiOS 5.0 and above to detect for custom servers used to perform DoH.

affected-products-logoAffected Products

DNS over HTTPS

Impact logoImpact

Unexpected network communication

Technology

Browser-Based, Network-Protocol, Client-Server, Peer-to-Peer, Cloud-Based, Mobile-Device

Behavior

  • Tunneling

Default Ports

  • TCP/443

Version Updates

Date Version Detail
2022-07-12 21.354 Sig Added
2021-10-21 18.183 Sig Added
2020-07-20 15.889 Sig Added
2020-04-14 15.816 Sig Added
2020-01-03 15.752 Sig Added
2019-05-07 14.608