PPTP VPN tracing

Problem: user cannot connect to the PPTP VPN server. Error message showing in system log of the VPN server:

"The user hasconnected and failed to authenticate on port VPN3-127. The line has beendisconnected."

Troubleshooting:

To enable RAS tracing on the VPN server: run " netsh ras set tr * en"
It will create a new folder: c:\windows\tracing
Then check the iassam log file from %windir%\tracing folder

To disable RAS tracing : netsh ras set tr * di