I am having a DNS issue with at least a couple of customers being unable to hit our website at all with chrome just reporting "This webpage is not available" (both over http or https), but DNS and network config is not my strong suit.
downforeveryoneorjustme.com says that it's up, and I know it works for some of our customers as I have the analytics that shows them logging in, but I am worried about how widespread the issue is.
All my DNS settings/CNAMEs/SSL stuff have been in place for a few weeks now, so I don't think it should be a DNS propagation issue.
How do I go about debugging this issue without access to the machines/networks that are affected? I am happy to ask my customers to run a few shell commands and send me the results (but I obviously don't want to hassle them too much) but I am not sure which commands would be the most useful.
The customers in question can see floatapp.com but not https://beta.floatapp.com or http://beta.floatapp.com/images/branding/logo-vertical.png