How to gather Fiddler logs to analyze web traffic

Overview

Sometimes, you may encounter problems with M-Files Web Access (MFWA). Problems may include some operation in MFWA is very slow to perform or might even result in timeout. In other situations, failed login, slow login, or some other operation is MFWA may not work in a timely manner or fail. In such circumstances Fiddler log can help to analyze network traffics and may help to determine errors that are occurring during HTTP or HTTPS calls.
Beside Fiddler log, Network log from web browser ( i.e. Google Chrome) can be also helpful in such MFWA related investigation : How to gather network log from Google Chrome for M-Files

Solution

Here are the detailed instructions on how to gather logs using Fiddler send it for investigation.

1. Download the free Fiddler web traffic analyzer from

https://www.telerik.com/download/fiddler

2. Install Fiddler on a Windows workstation or server where you intend capture the traffic
3. Open newly installed Fiddler.
4. Stop Capture traffic under the File menu or press F12
5. From the Fiddler Menu, select TOOLS -> FIDDLER OPTIONS
6. Change to the HTTPS tab.
7. Enable the following settings:
   1. Capture HTTPS CONNECTs
   2. Decrypt HTTPS traffic
   3. (select) ..... from all processes
8. Accept the prompts to Trust and Install the Fiddler Root Certificate. (This step is required to decrypt HTTPS traffic)
9. Now, enable Capture traffic from the File menu or press F12
10. Reproduce the scenario where the problem occurs. If possible, please log down the time when it occurs. You can repeat the problem a few times.
11. Once you have done the requested steps, stop the Fiddler trace by pressing F12. Save the trace by selecting File -> Save -> All Sessions as a Session Archive (.saz) file.
12. Compress this file to a .zip package and send it to M-Files support.