xFi - Setup...

Hello @MjC48074 . It will my pleasure to assist you with your question. When you stated that you have an xFi tower, which type of xFi tower do you own ? If you're not sure, please visit for a visual for all our capable xFi towers (gateways): https://www.xfinity.com/support/articles/broadband-gateways-userguides

The button you are referring to is the WPS Button ( WiFi Protected Setup ). It allows you to connect other devices (such as smartphones, tablets, etc) instead of entering the WiFi Password. For more information about WPS button, please visit : https://www.xfinity.com/support/articles/wifi-protected-setup. I hope this helps ! 

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@MjC48074 wrote:

On the xFi Tower ...   The Button on the top lower left of system - is for what purpose

when I pushed it - it blinked Blue...

Then I noticed that all of my VPN capibility to Corporate Office had all failed...

Is there any corralation ???

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As an FYI, WPS has a security vulnerability. You can Google for more info. Never use it. Disable it and always configure your WiFi settings manually !

https://www.google.com/search?q=wps+security+risk&oq=wps+security+risk&aqs=chrome..69i57.14768j0j4&s...