I purchased the Deco 5 system about a month ago.  I was having issues connecting to my work VPN with my old router.  For the first 3 + weeks, the Deco 5 connected to my VPN flawlessly.  Suddenly it stopped and I haven't been able to connect for the past several days.  I did not change any settings that should have stopped it from connecting.  I was able to connect my modem directly to my computer.  When I did this, I was able to connect to the VPN.  My modem only has one ethernet port which connects the router.  With other family members needing the internet, leaving the modem hardwired to my computer is not an option.  Any ideas on how to adjust my router settings to allow it to connect to my VPN?  I turned off the security options through the app - still won't connect.  

Any assistance would be much appreciated.  Please note that I am by far a computer guru.  If any help provided could be explained at about a 4th grade level, it would be appreciated.