External faults.
WHAT SUGGESTS AN EXTERNAL PROBLEM
One destination affected while everything else works Others reporting the same problem A trace stopping partway, beyond your provider
WHAT TO CHECK
Whether the service is reachable from elsewhere Whether the service has reported a problem Whether a mobile connection behaves the same
THE MOBILE TEST
Testing on an entirely different connection separates your network from the destination.
WHAT TO DO ABOUT A PROVIDER-SIDE PROBLEM
Report it with evidence: times, traces, results.
WHAT TO DO ABOUT A DESTINATION-SIDE PROBLEM
Wait, and check their status.
There is usually nothing you can do.
WHAT NOT TO DO
Reconfigure your network in response to someone else's outage.
That causes a second problem.
WHAT TO RECORD
What you observed, so you recognise it if it recurs.
WHAT TO TELL AFFECTED PEOPLE
What is happening and that it is external.
WHAT TO PREPARE
An alternative route for anything essential.
