When you use PPP (Dial-In or PPTP) and like to get some log data out of your connections for analytics (connections problems etc.), enable the tracing feature with the following commands inside the ‘Command Prompt’:
set tracing PPP enable
The PPP.log file will placed/written in the %SystemRoot%\Tracing folder.
When you are finished with the analytics disable the tracing with this commands inside the ‘Command Prompt’:
set tracing PPP disabled