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How to enable verbose/debug WebApp logging for AppScan Enterprise

Technote (FAQ)


How do you enable the verbose or debug WebApp logging option in the IBM Security AppScan Enterprise or IBM Rational Policy Tester?


      CAUTION: This logging being enabled can severely affect the WebApp and service performance. Disable it when you do not need it.
      This solution contains information about modifying the system registry. Before making any modifications to the Microsoft Registry Editor, it is strongly recommended that you make a backup of the existing registry. For more information describing how to back up the registry, refer to Microsoft Knowledge Base article 256986.

To the logging perform the following steps:

  1. Open the registry editor on the Control Center machine (Start > Run > Regedit)

  2. Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\IBM\AppScanEnterprise\Log

  3. Change the MsgLogLevel value to:
    • 0 for verbose logging
    • FFFFFFFF (or 4294967295 in decimal) for debug logging

  4. Restart the following services:
    • IBM Security AppScan Enterprise Alert Service
    • IBM Security AppScan Enterprise Agent Service
    • IBM Security AppScan Enterprise Server
    • IIS Admin Service

The logs will be saved in the <ASE-installation>\Logs folder in log files: Log.txt, Log1.txt, Log2.txt, ....

    Where the <ASE-installation> folder is by default: C:\Program Files\IBM\Rational ASE\Logs or C:\Program Files (x86)\IBM\AppScan Enterprise\Logs.

After the troubleshooting is completed, disable the logging by changing the registry value for MsgLogLevel to " 4", and restart the services.

Cross reference information
Segment Product Component Platform Version Edition
Security Rational Policy Tester Configuration

Document information

More support for: IBM Security AppScan Enterprise

Software version:,, 8.8,, 9.0,, 9.0.1,, 9.0.2,, 9.0.3,,,

Operating system(s): Windows

Reference #: 1301982

Modified date: 07 February 2014

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