For the past 8 months I have been using Private Internet Access (PIA) VPN installed on a Netgear R8000 router using DD-WRT OpenVPN and today when I tried to connect to Google Play with my Samsung Galaxy Note 4 phone to check and update the installed apps I was unable to make a connection.
I tested the wifi further by loading websites using Chrome and duckduckgo app, and music streaming from a radio station was also possible but Google Play would not connect.
I believe the problem is with PIA VPN when operating and connecting via the router because if I disable the VPN a connection is made. ALSO tested by turning OFF wifi and using cellular MobileData with PIA VPN turned ON and again a connection was possible.
Have you experienced this issue when using DD-WRT on the router and how did you resolve the odd situation?
UPDATE to my original post.
I found a solution by lowering the MTU setting from 1500 to 1400 in the Open VPN configuration screen.
We were also experiencing one client computer was unable to send SMTP email. Weird. But changing the MTU solved both issues.
Additional note: From my experience I found VPN performance tunnel speed was crippled when using the router to do the encryption number crunching. Although the R8000 is a great processor for a router, performance is always better when your computer does the hard work.
My recommendation: Only use VPN on the router when you truly need it otherwise use the computer.