Using Fiddler for Internet troubleshooting

Date: 11th December 2009
Product/Release: LANSA for the Web
Abstract: Instructions performed to attain the Fiddler trace details for troubleshooting
Submitted By: LANSA Technical Support

Fiddler runs on your PC, monitoring all traffic between your web browser and the internet. LANSA Technical Support may ask you to follow the instructions below to produce a Fiddler trace file as part of the problem resolution.

Does it have to be installed? Yes. From
How you turn it on? Run the Fiddler application on the same PC as the browser.
To start capturing traffic select Capture Traffic from the File menu.
How you turn stop it? Deselect Capture Traffic from the File menu or close the Fiddler application.
How is it typically used to isolate problems?
  • Open your web browser and clear your browser cache (to completely clear the IE8 cache review this tip)
  • Close your web browser.
  • Start Fiddler and turn on the Capture Traffic option.
  • Reproduce the problem in your web browser.
  • In Fiddler - select File > Save -> All Sessions
  • Send the resulting .saz (Session Archive) file to support.