Hello, Thank you for the report.
Browsing to IP addresses directly does not work because of virtual hosting: https://en.wikipedia.org/wiki/Virtual_hosting Virtual hosting requires the "Host" header. You can see that this request returns 404: $ curl http://91.189.88.152/ubuntu/ but if I send the header it works fine: $ curl -H "Host: security.ubuntu.com" http://91.189.88.152/ubuntu/ It's hard to say for sure what's causing the problem but my guess would be lack of "apt update" before "apt install". Can I also suggest that you reach out to the docker community for help? As far as I can see security.ubuntu.com servers are working as expected. I will mark this bug as invalid but if I got something wrong please reopen. ** Changed in: ubuntu Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1745129 Title: DNS for security.ubuntu.com and archive.ubuntu.com resolves to IP address that gives 404 when installing packages. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1745129/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
