: How to diagnose one user not able to reach my site? My site is www.trainerroad.com and lives on Azure. I have a customer who get's Oops! Google Chrome could not connect to www.trainerroad.com

@Jessie594

We've addressed this from the other side on Super User as a Community FAQ:


How do I diagnose not being able to reach a specific website as an end user?

If I can generally reach web pages on the Internet but can't reach a specific one, how do I troubleshoot what the cause is as an end user?


You may find some of the tips over there useful for helping your client to debug the problem. Some of the suggestions:


Make sure the site isn't down for everyone (done)
Check that DNS resolves properly (done)
Try a different browser
Do a trace route and see if the connections time out somewhere along the way
Make sure it isn't the router — try a different router, or try connecting at a friend's house
Try a different DNS resolver (just in case)

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@Eichhorn148

Is it only in Chrome this happens? I would ask them to check in one other browser.

Could it be set up to live behind a proxy (that isn't getting hit by the nslookup)? Ask for maybe a print screen of their settings page.

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@Welton855

When it is clear the issue isn't on your side (which by looking at your question it isn't) I would just suggest the customer to contact his IT department.

It could be anything (hosts file / firewall / proxy / something else).

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