PPP (Point-to-Point) protocol is used to establish, authenticae, and assign IP addresses to incoming and out-going dial-up connections.

If you need to troubleshoot a connection on Windows 2000 Professional, temporarily (because it eats resources) enable PPP logging:

1. Open a CMD prompt.

2. Type the following:

    netsh
    ras
    set tracing PPP enable

NOTE: The log is created at %SystemRoot%\tracing.

To disable PPP logging on Windows 2000 Professional:

1. Open a CMD prompt.

2. Type the following:

    netsh
    ras
    set tracing PPP disable