1. Julia Evans

1.1. Why is DNS still hard to learn?

https://jvns.ca/blog/2023/07/28/why-is-dns-still-hard-to-learn/

But it took me YEARS to figure out how to confidently debug DNS issues,
and I’ve seen a lot of other programmers struggle with debugging DNS problems as well. 
So what’s going on?

Here are a couple of thoughts about why learning to troubleshoot DNS problems is hard.

1.2. history

it’s not because DNS is super hard
a lot of the system is hidden
 dealing with hidden systems
Extended DNS Errors seem cool
confusing tools
 dealing with confusing tools
weird gotchas
 dealing with weird gotchas
infrequent exposure
it’s hard to experiment with

Extended DNS Errors are a new way for DNS servers to provide extra debuggging information in DNS responss.

• Here’s an example of what that looks like:

CategoryDns CategoryWatch CategoryTemplate