VPN broke. Is my setup right?

[Maui19]

Sometime in the past few months, my VPN setup stopped working. It was working well when I last used it this summer. Now, after upgrading to Mavericks Server on my Mini, Yosemite on my Macbook Air, and iOS 8 on my iPhone 5s, I can't get it to work. My logs show that my Server appears to be listening, but my MBA or iPhone don't connect with it to even begin negotiation.

I have a static IP with my ISP, and an Asus router between my Mini Server and my cable modem. I have a static IP, which I use as my host name, and a router-assigned IP address, which use in my VPN settings.

I have tried a whole bunch of different settings, etc, but no joy. I even tried using Time Machine to revert back to my settings from last summer (when everything worked), but Server seems to retain my current settings rather than reverting to my old settings. I would love to delete all my server settings and reinstall, but that appears to be difficult to manage.

Any suggestions? TIA

 

[Cubytus]

It's a well-known fact that Yosemite broke a number of VPN setups, to the point many organizations currently advise against upgrading. Have you tried a connection between non-Yosemite OSes?

 

[Maui19]

It's a well-known fact that Yosemite broke a number of VPN setups, to the point many organizations currently advise against upgrading. Have you tried a connection between non-Yosemite OSes?

Just my iPhone 5S, and that doesn't work either.

 

[Cubytus]

Just my iPhone 5S, and that doesn't work either.

Running iOS 8?

 

[Maui19]

Running iOS 8?

Yes

 

[Cubytus]

Yes

Just as it's the same generation as Yosemite and now that Mac OS X is under heavy iOS influence, I wouldn't be surprised to learn that what is broke in Yosemite is also broke in iOS 8.