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Comment on How do I stop Docker trying to pull from IPv6?

I’m happy to keep it public if only for the off chance that if we find a solution it might some day help someone else with the same issue.

I’m not 100% sure how to find the OS version, but uname -a outputs […]6.12.25+rpt-rpi-v8[…]. /etc/os-release contains “Debian GNU/Linux 12 (bookworm)”. It should be whatever was latest as of a month or two ago when I installed the OS fresh.

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iglou@programming.dev ⁨2⁩ ⁨days⁩ ago

I have read the rest of the comments to see what you already tried. I was about yo tell you to use sysctl to disable ipv6 but it looks like that is already done.

As a matter of fact, it looks like you have no ipv6 address at all. Which makes me think that your DNS config is off.

Can you show me the content of /etc/resolv.conf ?

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Zagorath@aussie.zone ⁨2⁩ ⁨days⁩ ago

$ dig registry-1.docker.io

; <<>> DiG 9.18.33-1~deb12u2-Debian <<>> registry-1.docker.io
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 50801
;; flags: qr rd ra; QUERY: 1, ANSWER: 8, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
;; QUESTION SECTION:
;registry-1.docker.io.          IN      A

;; ANSWER SECTION:
registry-1.docker.io.   33      IN      A       54.210.249.78
registry-1.docker.io.   33      IN      A       44.218.153.24
registry-1.docker.io.   33      IN      A       107.20.112.188
registry-1.docker.io.   33      IN      A       34.234.222.10
registry-1.docker.io.   33      IN      A       34.195.83.243
registry-1.docker.io.   33      IN      A       52.21.128.203
registry-1.docker.io.   33      IN      A       52.0.248.137
registry-1.docker.io.   33      IN      A       52.207.69.161

;; Query time: 47 msec
;; SERVER: 192.168.20.1#53(192.168.20.1) (UDP)
;; WHEN: Tue Aug 12 22:27:45 AEST 2025
;; MSG SIZE  rcvd: 177
$ cat /etc/resolv.conf
# Generated by NetworkManager
search Home
nameserver 192.168.20.1

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iglou@programming.dev ⁨2⁩ ⁨days⁩ ago
Well this is getting weird.

Have you tried checking if your os has a resolution cashe active? If so, try to flush it.

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- Zagorath@aussie.zone ⁨2⁩ ⁨days⁩ ago
  I never set one up myself, and this 11 year-old thread implies that Raspbian doesn’t have one set up by default. It is a very old thread though, so could be wrong.
  
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