DNS Deep Dive

The most comprehensive course on the DNS protocol

4.50 (1279 reviews)

Udemy

platform

English

language

Network & Security

What you will learn

How to configure authoritative name servers, cache only servers and resolvers

How to troubleshoot DNS issues

How to choose, register and manage your own domain names

How to secure your DNS infrastructure

How to analyse the DNS protocol using Wireshark

How to construct your own DNS packets from scratch using Scapy

How to configure DNS servers using the bind9 service

How to capture DNS traffic using tcpdump

How to configure DNS caching using the nscd service

How to set up your own lab using VirtualBox

How to automate the configuration of your DNS infrastructure using bash scripting

How to perform name queries using dig, nslookup and getent

How to create a professional website and configure its DNS records

How to manipulate the name resolution order

Course Gallery

DNS Deep Dive – Screenshot 1 — Screenshot 1 – DNS Deep Dive

DNS Deep Dive – Screenshot 2 — Screenshot 2 – DNS Deep Dive

DNS Deep Dive – Screenshot 3 — Screenshot 3 – DNS Deep Dive

DNS Deep Dive – Screenshot 4 — Screenshot 4 – DNS Deep Dive

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Comidoc Review

Our Verdict

While this DNS Deep Dive course on Udemy may not bring you all the way to "Veteran" status, it still offers valuable and detailed insights into the workings of DNS. The instructor, Nicholas Doropoulos, presents students with engaging and helpful real-world scenarios that solidify understanding while also covering essential troubleshooting processes. With 4.47 global rating from 7623 subscribers as of May 2025, the course proves to be an excellent starting point for those wishing to understand DNS fundamentals from scratch before potentially exploring deeper topics independently.

What We Liked

Instructor provides in-depth coverage of DNS protocol, theory, and practical applications.
Structured course format with short, targeted videos allows for easy reference and review.
Real-world scenarios and lab setup enhance understanding of functional DNS deployments.
Covers troubleshooting and securing DNS infrastructure.
Clear explanations from an experienced instructor that instills a strong foundation in DNS concepts.

Potential Drawbacks

Virtual machine fan noise occasionally disrupts audio quality; headset usage is recommended.
Occasional discrepancies between theory and course materials necessitate adaptation to user's environment.
Minimal depth achieved in some topics, requiring self-driven research for complete understanding.
Video border graphic can be initially charming but becomes distracting due to its small size compared to the actual presentation area.