I'm receiving


I'm receiving the following error on two different sites on two different servers with the same server software stack:
Your server had a problem connecting to WPMU DEV: "cURL error 6: name lookup timed out". Please try again.

If this problem continues, please contact your host with this error message and ask:

"Is php on my server properly configured to be able to contact https://premium.wpmudev.org/api/dashboard/v1/ with a POST HTTP request via fsockopen or CURL?"

I've tested cURL via SSH at the command line and it works for connecting to Google but fails to connect to WPMUDEV. I receive this error from command line:
# curl https://premium.wpmudev.org/api/dashboard/v1/
curl: (6) Couldn't resolve host 'premium.wpmudev.org'

# host https://premium.wpmudev.org
;; connection timed out; trying next origin
Host https://premium.wpmudev.org not found: 3(NXDOMAIN)

# curl http://google.com
<HTML><HEAD><meta http-equiv="content-type" content="text/html;charset=utf-8">
<H1>301 Moved</H1>
The document has moved

This tells me that the server's cURL function is working as expected and that the issue is not located within the WordPress environment. I tried adding the IP address to my CSF/LFD firewall and had no luck with that either.

What should I try next?