What is DNS Tunneling and how to detect it?

by | Sep 3, 2020 | CCNP, CompTIA, Data Breaches and Prevention, End Point Protection, Exclusive Articles, Featured, Malware Prevention, Securing DNS

DNS Tunneling

What is DNS Tunneling?

DNS tunneling is a method using which attackers encode malicious data in DNS queries and responses and exploit that for malicious purposes. DNS tunneling is often used by attackers to evade the firewalls and other security systems of an organization. Attackers usually infect an endpoint system with malware and send malicious DNS queries from the system. The malicious DNS queries are redirected to an authoritative nameserver that is controlled by the attackers. Now, the attackers can create a tunnel and exchange malicious payloads through DNS queries and responses.

How does DNS tunneling work? And, how can we detect it? In this article, we would discuss that in detail.


In this article, we will discuss:

  • What is DNS Tunneling?

  • How does the DNS work?

  • What are the different types of DNS records?

  • How does DNS Tunneling work?

  • How to detect DNS Tunneling?

    • Payload Analysis

    • Traffic Analysis

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Amrita Mitra

Author

Ms. Amrita Mitra is an author, who has authored the books “Cryptography And Public Key Infrastructure“, “Web Application Vulnerabilities And Prevention“, “A Guide To Cyber Security” and “Phishing: Detection, Analysis And Prevention“. She is also the founder of Asigosec Technologies, the company that owns The Security Buddy.

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