Publication detail

DNS over HTTPS Detection Using Standard Flow Telemetry

JEŘÁBEK, K. HYNEK, K. RYŠAVÝ, O. BURGETOVÁ, I.

Original Title

DNS over HTTPS Detection Using Standard Flow Telemetry

Type

journal article in Web of Science

Language

English

Original Abstract

The aim of DNS over HTTPS (DoH) is to enhance users’ privacy by encrypting DNS. However, it also enables adversaries to bypass security mechanisms that rely on inspecting unencrypted DNS. Therefore in some networks, it is crucial to detect and block DoH to maintain security. Unfortunately, DoH is particularly challenging to detect, because it is designed to blend into regular HTTPS traffic. So far, there have been numerous proposals for DoH detection; however, they rely on specialized flow monitoring software that can export complex features that cannot be often computed on the running sequence or suffer from low accuracy. These properties significantly limit their mass deployment into real-world environments. Therefore this study proposes a novel DoH detector that uses IP-based, machine learning, and active probing techniques to detect DoH effectively with standard flow monitoring software. The use of classical flow features also enables its deployment in any network infrastructure with flow-monitoring appliances such as intelligent switches, firewalls, or routers. The proposed approach was tested using lab-created and real-world ISP-based network data and achieved a high classification accuracy of 0.999 and an F1 score of 0.998 with no false positives.

Keywords

DNS over HTTPS,DoH,Machine Learning,Detection,Classification,Network Monitoring,Network Flows

Authors

JEŘÁBEK, K.; HYNEK, K.; RYŠAVÝ, O.; BURGETOVÁ, I.

Released

31. 1. 2023

Publisher

IEEE

ISBN

2169-3536

Periodical

IEEE Access

Year of study

2023

Number

11

State

United States of America

Pages from

50000

Pages to

50012

Pages count

13

URL

https://ieeexplore.ieee.org/abstract/document/10123708

Full text in the Digital Library

http://hdl.handle.net/11012/244289

BibTex

@article{BUT185138,
  author="Kamil {Jeřábek} and Karel {Hynek} and Ondřej {Ryšavý} and Ivana {Burgetová}",
  title="DNS over HTTPS Detection Using Standard Flow Telemetry",
  journal="IEEE Access",
  year="2023",
  volume="2023",
  number="11",
  pages="50000--50012",
  doi="10.1109/ACCESS.2023.3275744",
  issn="2169-3536",
  url="https://ieeexplore.ieee.org/abstract/document/10123708"
}