Suggestion for easy solution for the IPv6-related timeout problem

Alexei Khlebnikov's Avatar

Alexei Khlebnikov

19 Sep, 2018 03:27 PM

The discussion has been closed, even though the problem has not been solved. I guess that it happened, because the Support Staff wants to fix the problem properly, i.e. set up IPv6 routing properly or something like that, but do not have time for the proper solution so far.

Thus I'd like to propose an easy solution. If you can not provide reliable access to rubygems via IPv6 - just remove its IPv6 addresses from the DNS!

Particularly, you can remove these DNS records:           578     IN      AAAA    2a04:4e42::70           578     IN      AAAA    2a04:4e42:600::70           578     IN      AAAA    2a04:4e42:400::70           578     IN      AAAA    2a04:4e42:200::70

And then will be available via IPv4 only, but at least it will be available! Maybe you don't realize, but timeout on IPv6 basically blocks access via IPv4 as well! Now repository is inaccessible without tricks for many people for several months! The result is that people laugh at Ruby and choose Python instead. :(

If you still want to provide access via IPv6 in test mode - please consider doing it via another hostname, for example

  1. Support Staff 1 Posted by kerrizor on 29 Sep, 2018 08:27 PM

    kerrizor's Avatar

    Thanks for writing in. We believe the issue with IPv6 is not on our side, as our configuration appears to be correct; do you have specific information that points to an issue on our side?

  2. kerrizor closed this discussion on 29 Sep, 2018 08:27 PM.

  3. Alexei Khlebnikov re-opened this discussion on 01 Oct, 2018 11:48 AM

  4. 2 Posted by Alexei Khlebnik... on 01 Oct, 2018 11:48 AM

    Alexei Khlebnikov's Avatar

    I provided some findings in ,
    including doing some test that Aditya asked me to do.

    I can add that I could successfully ping, tcptraceroute and tcp-connect
    to ports 80 and 443 for the destination IP, but the same
    failed for 2a04:4e42::70.

    I can successfully ping, tcptraceroute and tcp-connect to ports 80 and
    443 for the destination IP 2a00:1450:400f:80c::2004, address of So my IPv6 setup seems to work.

     > our configuration appears to be correct

    It can very well be so, but, for example, routing may be broken
    somewhere in the middle. Maybe it's a misconfiguration on some
    Internet-backbone router, I don't know. But the practical outcome is
    that gem is unusable. And I'd make it usable first, then investigate the
    problem, as it can take much time.

    I am also reminding that it is not only me who has this issue. See, for
    example, these threads on Stack Overflow:

    On 29. sep. 2018 22:27, kerrizor wrote:

  5. Support Staff 3 Posted by kerrizor on 07 Oct, 2018 04:35 PM

    kerrizor's Avatar

    Thanks for the additional information, Alexei. I've raised this internally, and we'll continue to investigate.

Reply to this discussion

Internal reply

Formatting help / Preview (switch to plain text) No formatting (switch to Markdown)

Attaching KB article:


Attached Files

You can attach files up to 10MB

If you don't have an account yet, we need to confirm you're human and not a machine trying to post spam.

Keyboard shortcuts


? Show this help
ESC Blurs the current field

Comment Form

r Focus the comment reply box
^ + ↩ Submit the comment

You can use Command ⌘ instead of Control ^ on Mac