undefined | Better HN

0 pointsbaby_souffle2y ago0 comments

> I dig that idea, I'll have to think of the best way to pull that data while keeping the app stateless and fast.

Reverse DNS lookups are usually pretty quick:

```shell

  > time dig +short -x 2600:dead::beef
  customer.my-isp.net.
  dig +short -x 2600:dead::beef  0.00s user 0.01s system 1% cpu 0.882 total

```

0 comments

teh_klev2y ago

This might be useful to review:

https://news.ycombinator.com/formatdoc

"Text after a blank line that is indented by two or more spaces is reproduced verbatim. (This is intended for code.)"

baby_souffleOP2y ago

Thanks.

I spend all day writing markdown and fenced blocks with type-hint is muscle memory at this point

spacehunt2y ago

Reverse DNS does not give you all the hostnames that can point to a particular IP address though.

necovek2y ago

Other than brute forcing, I don't think anything does — that's the beauty and the curse of a proper federated system :)

jedberg2y ago

In fact, it might not even give you any names that point to an IP address, since it might be out of sync with the forward system, especially if the records are built by hand.

j / k navigate · click thread line to collapse