Three major types of #DNS failures are timeouts, latency, and DNS NXDOMAIN errors. Observability tools often can overlook these areas - so do they matter? Well, it depends how many services you would like to break.

Assuming your answer is ‘none’ – head over to our blog to learn how to master effective DNS observability and keep your system running failure-free:

https://t.ly/RycwR

#NXDOMAIN #opensource #devops #tech #IT #observability #SRE #coroot #mongodb

This one is a pretty long read, and it goes into details of observed #NXDOMAIN patterns with a bias towards the #DNS landscape in #China. I did not expect to see so much leakage of non-public TLDs, but I guess that - despite the bias towards Chinese networks- it probably looks similar in other parts of the world.

After reading this pretty long article, I was still somewhat feeling that it should have gone deeper into query flood phenomena which might cause spikes in NXDOMAIN responses.

No matter what, a well-spent 10 minutes on educating yourself on things that are often not illuminated on one of the #Internet core protocols.

Have a nice weekend, everyone!

#rootservers #infosec

Apparently all .tv domains registered through Sarek Oy (sarek.fi; or #Njalla, which uses them) are currently disabled by the .tv registry (turnon.tv / godaddy). No details are known and domain owners were not notified. This affects a few piracy sites, but also any other unrelated .tv domains, unfortunately including my jomo.tv domain. Piracy related .tv domains using a different registrar are not affected.

#tv #turnontv #godaddy #sarek #sarekfi #sarekoy #dns #serverhold #whois #piracy #nxdomain

@dangillmor already #dotZIP & #dotMOV are basically exclusively used for #Malware & #Phishing to the point that I'd not be surprised if bir corpirations will just rollout #hostfile|s that redirect #zip & #mov - domains onto some warning site or flat out yeet aka. #NXDOMAIN them...

@lattera
Do you know where those two commands NXDOMAIN and NOERROR are documented.

Unfortunately, the manual via `man hosts' has no mention of them.

#hosts #etcHosts #hostsFile #NXDomain #NOError

DNS-Techniker arbeiten wohl noch. #NXDOMAIN #rC3

Der Hostname im #PTR-Record meiner #IPv4-Adresse bei #Fiber7 löst seit heute mittag nicht mehr auf. (#NXDOMAIN). Das ist doof, wenn man an einer /etc/hosts.allow mit Hostnamen oder Domains drin vorbei muss.

Ist das sonst noch jemand aufgefallen?

Now, #DNS extended errors (today, only a very small choice of possibles errors, compare with HTTP with all its status codes https://www.flickr.com/photos/girliemac/sets/72157628409467125/ ). #IETF100 #SERVFAIL #NXDOMAIN #REFUSED