Resolve "9964 Internet Service Provider Failure When Processing Transactions" Error on Universal Transaction Gateway

What is causing this Error?

The Universal Transaction Gateway (UTG) cannot connect to the Shift4 data center across the internet on any route.

How do I resolve this Error?

Test the internet connection: Open an internet browser and go to a site you have not accessed before, or perform a search on your preferred search engine to confirm whether your internet connection is active.

If you can access the internet from the browser, then something is blocking the UTG from being able to connect to the data center. Visit Troubleshoot Using the S4Probe to determine UTG's connection issues to the data center.

If you cannot access the internet from the browser, you should contact your Internet Service Provider to re-establish your internet connection.

NOTE: Once you are able to access the internet again, restart the UTG and try a transaction.