A customer called saying she couldn't connect to the ECS as she routinely does, received the connection refused error. I called back and left a voicemail to call me back so I can instruct how to temporarily disconnect the network connection to the ECS.

Didn't hear back so I called her back today - now she can get in. I kinda thought that would be the case. I got the same message once using a customer's VPN connection a while back. Tried a few days later and it was Ok. I wonder what the cause (or maybe many factors) would typically be for that error and would there be a way to restore the connection?