http://ocsp.int-x3.letsencrypt.org/ is not working in hongkong. [image]

@Phil , thanks for your answer, any news on this? We’ve been trying to bug Akamai about this as well :slight_smile:

@ranrub Unfortunately no good solution has been created yet. We’re still active on our Akamai ticket.

Further researching this, this looks to be a pure DNS problem. When dig is run out outside china, i get an ip address that is reachable from within china. So, this is specifically a DNS problem from within China: ran@Rans-MacBook-Pro ~ % dig ocsp.int-x3.letsencrypt.org ; <<>> DiG 9.10.6 <<>> ocsp.…

@Phil any news on this issue? Thanks!

Our CDN provider shares the conclusion other folks on this thread have reached, that it appears to be a problem caused by the Great Firewall interfering with DNS. We probably cannot work around this issue on our end. A couple of possible workarounds for clients that you control: If you configure a…

@jsha , I’m sorry but I do not control the clients. My customer in this case is an IOT provider of smart devices running a hardened realtime OS, they can’t patch them. Look at the answer section in the call from China: ;; ANSWER SECTION: ocsp.int-x3.letsencrypt.org. 5580 IN CNAME ocsp.int-x3.letsenc…

[image] ranrub: they would have blocked x1,x2,x4 as well These receive no traffic to begin with, as they are for retired or backup issuers. No reason to block something that's not used. But changing the CNAME does sound like a good idea in theory, if they haven't tried it already.

[image] ranrub: I believe Akamai can fix this, by changing the slot number (a771) to one that is not being interfered with. This is a good idea, we'll ask about this.

@jsha / @_az any news about this? Thanks! Ran

Currently waiting on an update from Akamai.

Ocsp.int-x3.letsencrypt.org is not working in China

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Ocsp.int-x3.letsencrypt.org is not working in China

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