164
In conclusion: Magic DNS
(thelemmy.club)
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
this post was submitted on 10 Feb 2026
164 points (98.2% liked)
Programmer Humor
29648 readers
908 users here now
Welcome to Programmer Humor!
This is a place where you can post jokes, memes, humor, etc. related to programming!
For sharing awful code theres also Programming Horror.
Rules
- Keep content in english
- No advertisements
- Posts must be related to programming or programmer topics
founded 2 years ago
MODERATORS
Your IP may unfortunately be inside a CIDR block that largely does nothing but spam my infrastructure with script kiddie tomfoolery. Firewall rules apply to my authoritative DNS servers as well.
Edit: If you would like me to whitelist it, DM me your IP and I'll add a narrow exception.
but I don't run a recursive resolver, I use quad9 as upstream. Shouldn't they return a response even if I was blocked?
dig confirms with EDNS extensions that the response is coming from quad9. the error says "no reachable authority" so it must be at least partly what you say, but I think you ended up blocking a DNS provider.
FYI: I moved the allow rule for DNS to the top of the chain, so that should fix problems with DNS providers not being able to reach the authoritative name servers.
thanks, it seems it worked! the post image now loads fine
Ugh. Thanks. It's quite possible, though maybe just a regional one? I did inadvertently block one of the IPs Let's Encrypt uses for secondary validation, so this may be another case of that.
I get a shitload of bad traffic from the southeast Asia area (mostly Philippines/Singapore AWS) and have taken to blanket blocking their whole routes rather than constantly playing whack-a-mole. Fail2ban only goes so far for case-by-case.
Here's the image from the meme from an alternate source: