DNS course for developers

2h 44m 2s
English
Paid

Learn DNS once and for all. They say you should learn the fundamentals, and the rest will fall into place. DNS is right at the foundation of the internet. Having a clear understanding of DNS will help you configure and debug DNS many times throughout your career.

DNS hasn't changed that much since its introduction in 1983 and it's unlikely to start now. DNS isn't going anywhere. The earlier you learn DNS, the longer you'll benefit. The great thing about DNS is that all the information is public. You can have perfect clarity if you know where to look.

Who is this course for?

This course is for you if you want to gain mastery over DNS.

It assumes you have a basic understanding of how the internet works, but you don't need to be an expert. This course assumes no prior networking experience and involves no programming.

If you've worked on DNS full-time for over a year, this course is probably not for you. Otherwise, you'll learn a lot! If you invest in your knowledge today, you'll benefit for the rest of your career.

About the Author: Ruurtjan Pul

Ruurtjan Pul thumbnail
Hi! I'm Ruurtjan Pul, a full-stack developer who used to suck at DNS. I've had many side projects over the years, and never completely understood why my DNS records didn't update. Or how long to wait until they do. Worse yet, I've had my emails bounce because I misconfigured SPF, DKIM and DMARC. I decided to learn DNS by making Nslookup.io, a web interface for DNS. I've read the RFCs to implement a custom DNS client and I now run my own DNS server. Nslookup has become popular enough to replace my income, so I'm working on it full-time since early 2022. Now that I've spent so much time learning DNS, I'm sharing everything I've learned in this comprehensive video course. It will teach you to reason about DNS from first principles and guard you against the mistakes I made. When you finish this course, you will be able to manage and debug DNS with confidence.

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#1: DNS is a database
All Course Lessons (39)
#Lesson TitleDurationAccess
1
DNS is a database Demo
03:01
2
The DNS is organized as a tree
02:58
3
Zone delegation
03:22
4
The root zone
03:08
5
Authoritative DNS servers
00:49
6
Zone transfer
04:00
7
Top-level domains
03:44
8
Second and third-level domains
01:02
9
Registries, registrars & registrants
03:07
10
ICANN-s oversight
01:38
11
WHOIS & RDAP
05:18
12
International domain names
02:15
13
The domain name lifecycle
02:58
14
Domain transfer
03:16
15
Recursive queries
04:23
16
Glue records
02:01
17
DNS caching
04:17
18
Negative caching
01:11
19
The DNS protocol
08:26
20
EDNS
04:19
21
Transport protocols
04:59
22
Public DNS resolvers
03:45
23
DDNS
02:11
24
Dynamic DNS responses
03:19
25
An overview of DNS record types
02:16
26
A and AAAA records
04:04
27
CNAME records
08:37
28
TXT records
03:22
29
SRV records
05:23
30
PTR records
05:17
31
DNSSEC-related record types
02:18
32
An overview of email configuration
04:35
33
Receiving email Resources and references
05:17
34
DANE Resources and references
08:08
35
MTA-STS Resources and references
06:29
36
SPF Resources and references
12:14
37
DKIM Resources and references
05:15
38
DMARC Resources and references
09:20
39
BIMI Resources and references
02:00
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