Failed to connect to acme-v02.api.letsencrypt.org

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1

This was working fine until a couple months ago. I can ping and traceroute to acme-v02.api.letsencrypt.org without issue.

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My domain is: seidkr.com

I ran this command: curl https://acme-v02.api.letsencrypt.org

It produced this output: curl: (7) Failed to connect to acme-v02.api.letsencrypt.org port 443 after 9 ms: Couldn't connect to server

My web server is (include version): Apache/2.4.59 (Unix)

The operating system my web server runs on is (include version): Gentoo

My hosting provider, if applicable, is:

I can login to a root shell on my machine (yes or no, or I don't know): yes

I'm using a control panel to manage my site (no, or provide the name and version of the control panel): no

The version of my client is (e.g. output of certbot --version or certbot-auto --version if you're using Certbot): 2.10.0

2

Can you use curl with the -v option? And if you see an IPv6 IP address, can you try again with -4 added?

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3

curl with -4 did work. I am using getssl script and apparently it doesn't include the -4 switch.

Thank you for the help.

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4

If that's the case, you probably should figure out why your IPv6 isn't working or if you don't have IPv6 to begin with why your Gentoo box thinks it does.

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5

Bingo! It appears the problem was with my local DNS cache. All is well again.

Thank you very very much.

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