Windows 10: On trying to connect to my work PPTP VPN, the first time after a reboot it fails with no...

I can connect from other PCs running Windows 10 so assume that there is no issue with either the RAS or my home network.

I have tried deleting and recreating the connection.

I have tried turning off the firewall.

The connection fails after the log on phase.

The network trouble shooter found no issues.

:)

 

PPTP VPN Trouble

I am trying to connect an at&t (formerly Cingular) 8125 to a PPTP VPN endpoint. I am able to browse using the isp.cingular access point, but when I try to connect to the VPN it consistently fails.

The Error:

At first, I received an error to check my username & password. But after I got isp.cingular to work, now the "connecting" dialog just disappears. When I click the top of the screen to see the active connections, I see only "Cingular GPRS" - the modem connection
that uses isp.cingular. In other words, I do not see the VPN connection in the list of connected devices.

My Troubleshooting:

I tried to connect over wifi after testing from a Windows XP laptop. The laptop connected to the VPN without problems. But the 8125 did not. I logged the packets that were transmitted and saw that there were GRE packets transmitted to the phone, but NONE
from the phone.

My Questions:

Is this a hardware issue with the phone? A software issue with Windows Mobile? A compatibility issue with the PPTP endpoint?

Also worth asking:

Does Windows Mobile support MPPE? We use an IAS server to perform radius authentication to a Watchguard PPTP endpoint. Are there specific changes that need to be made in IAS to allow WM to connect?

I really hope someone out there can shed some light for me on even one of these questions.

Thanks!

-Pete

 

PPTP VPN setup


The connection is between my Win10 laptop (build 10586.71) and my home Buffalo router. The connection worked fine before from Windows 7, and it still works via my android phone (6.0.1). But now, when I try to connect, I get "The PPP link control protocol was terminated."




The settings on the phone, which work are:
Type: PPTP
<checked> PPP encryption (MPPE)

Here are the error messages from the Event Viewer

 

Incoming PPTP Connections do not work on Windows 10 pro

There are many Step Guides on available on setting up PPTP Connections:

Here are a couple:

Windows 10 PPTP VPN Setup | My Private Network VPN

http://strongvpn.com/setup_windows_10_pptp.html

I suggest comparing the outlined procedures with how you you setup your own connection to see if you can identify any specific issues.