All my devices are offline!
The most common problem when all devices go offline is that an earlier failed restart of the service has left the BlockEnabled file. Follow those steps in Site Admin:
If the problem persists, check that your firewall is not blocking traffic from your devices.
1. Log in to Site Admin
2. Go to Devices (top menu)
3. Click on Test for the listeners you use.
If a test fails, verify your firewall.
If you still have problems, check our device troubleshooting guide.