If it was a technical support agent then they went with 8.8.8.8 because it was quicker and less prone to error, than looking up your ISP's DNS server addresses.

The IP addressed 8.8.8.8 (in addition to 8.8.4.4) is now used for Google's DNS server. How did they obtain this IP? Specifically, what has to happen for an IP to be routed to a different location.

If you want to check internet connectivity without checking DNS (which could be broken in itself), you can use Google's preferred DNS server 8.8.8.8, but the only port that it has open is 53 (aka domain): nc -w 3 -z 8.8.8.8 53 echo $? However, port 53 can be also blocked by your corporate firewall (not common, but possible).

The only reason I can think of for this would be if you wanted only one DNS server to be the one querying the internet for non-authoritative FQDNs. Usually the forwarders (used to resolve non-authoritative lookups) are set to external DNS servers like your ISP's or a common public resolver like 8.8.8.8 or just use Root Hint servers.

2017年10月4日 · addresses: [8.8.8.8,8.8.4.4] I've tried a parallel entry for enp0s8 that includes all the fields and that produced a strange result whereby the enp0s3 had two IP6 addresses and the enp0s8 had none and neither could communicate even with their gateway.

2021年12月3日 · I have a fresh installation of Windows 11 with ubuntu 20.04 installed inside wsl2. When I try to perform an update sudo apt update or even ping google.com I get Temporary failure resolving 'archive.

2023年10月7日 · I'm trying to change my DNS settings on my Debian 12 VPS, and by this I mean, I want to use a public resolver like 1.1.1.1 instead of my VPS host's resolver. I remember in Debian 11 I could just ed...

2021年2月5日 · I'm working on porting a collection of Docker images used for GitLab CI/CD building and deployment from Dockerhub to AWS public ECR. Everything works as it should except for the standard Docker image

2017年2月23日 · I'm running ubuntu server 16.04.2 and apt-get update returns temporary failure resolving "everything on the list". When I ping www.google.com, it responds with unknown host. When I ping with 8.8...

nslookup - 8.8.8.8 (using - instead of a host name puts NSLookup into interactive mode like just a plain nslookup does, except using Google's DNS server for queries).