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Ask HN: Anyone else having IPv6 issues with Cloudflare?

by rwky on 2/12/23, 1:16 AM with 13 comments

Got a bunch of pings from updown.io saying there are IPv6 timeouts to sites using cloudflare, they seem to be intermittent for about the past 30 minutes, nothing on the cloudflare status page though.

  • by adrienjarthon on 2/12/23, 10:12 PM

    adrien from updown.io here.

    Sorry about this, I still don't have any answer or explanation from Vultr or CloudFlare at this point. Most likely cause IMO is that CloudFlare (accidentally?) blocked one or many big ranges of IPs belonging to Vultr (and maybe some other providers as people seems to say Vultr was not the only impacted). I noticed during the incident this morning for example that I could ping CloudFlare IPv6 (ICMP) but not connect through TCP (port 443). So this sounds more like a firewall than a routing issue from what I could see.

    I'll update once I have anything else in https://status.updown.io/issue/1e196616-1368-43a0-8c04-82cff.... For the moment I'm keeping the mitigation in place just in case.

    If you have more details about this from CloudFlare or elsewhere I'll be happy to hear it :)

  • by palmeida on 2/12/23, 11:12 AM

    I have a personal monitoring system (uptime kuma) running on Hetzner (Germany data center) and since around 5am UTC today I am seeing intermittent timeouts only on services proxied by cloudflare so not just Vultr affected it seems…

  • by johnny81 on 2/12/23, 9:23 PM

    Issue seems to be resolved now: https://status.appbeat.io/

  • by ammmir on 2/12/23, 1:32 AM

    Yeah, I just woke up to some alerts, too. Sometimes I get the feeling people don't take IPv6 seriously!

  • by bbu on 2/12/23, 6:47 AM

    same for me :/ since 1:41 CET https://status.ioverlander.com/

  • by luisrudge on 2/12/23, 7:11 AM

    oh, so that's why I have 200 emails in my inbox? I use the same combo: updown.io and cloudflare. can it be related to updown.io?