this post was submitted on 11 Aug 2025
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I'm currently trying to install Docker on my old Raspberry Pi (3 Model B+) to host some personal projects. When I run docker run hello-world, I get:

Unable to find image 'hello-world:latest' locally
docker: Error response from daemon: Get "https://registry-1.docker.io/v2/library/hello-world/manifests/sha256:ec153840d1e635ac434fab5e377081f17e0e15afab27beb3f726c3265039cfff": dial tcp [2600:1f18:2148:bc00:eff:d3ae:b836:fa07]:443: connect: network is unreachable

My Internet connection does not support IPv6 at all, which would explain why this error occurs. But how do I force docker-pull to only use IPv4?

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[โ€“] cereals@discuss.tchncs.de 3 points 1 year ago* (last edited 1 year ago) (1 children)

Check your DHCP Server and disable DHCPv6. The raspi shouldn't get a ipv6 then and you won't have this problem in the future with other devices.

edit: and restart the pi after disabling DHCPv6

[โ€“] Zagorath@aussie.zone 2 points 1 year ago

DHCP server as in on my router?

"IPv6 LAN Auto Configuration" with everything "Off" or "Disable"

Still get exactly the same error.