Hey there,

I am using FiddlerCore's Demo to capture http as well as https traffic.
For my program it's quite important that its using ONE root-certificate, unfortunatly Certmaker is creating another rootcertificate each time i start my app.

I also created and installed a custom certificate I generated with OpenSSL. This certificate is accepted by Fiddler, whereas my own application is again creating another certificate.

Hope someone understands the problem, thanks for requests.
Cheers! :)

I am attempting to diagnose an issue with Microsoft's OneDrive for Business sync client and have encountered the problem that Fiddler is not capturing all the https connections made by the client, and I don't understand why.

I am not using a browser here at all, just starting the client manually from the Start menu.

By running Fiddler, Wireshark and Systinternals' Process Monitor simultaneously, I can see clearly that the client process (groove.exe) has https sessions with
nexus.officeapps.live.com, odc.officeapps.live.com, our on-site SharePoint service and O365 - which get captured by Fiddler - and with our ADFS server - which do not.

The process id of the groove.exe process is the same in each case.
There is also an instance of MsoSync.exe, a child of the groove.exe process, which also does not get captured by Fiddler.

Thinking that perhaps the client incorporates more than one http client stack, I have followed the instructions to manually set WinHTTP’s Proxy and also (even though it is not a service) followed the instructions on capturing traffic from .NET services. This made no difference.

Bright ideas on what's going on and how to capture the uncaptured sessions will be gratefully received :-)

Thanks ....


Environment:

Windows 7 (64 bit)
Office 2010 (32 bit)
IE 11
OneDrive for Business client (15.0.4623.1000, 32bit)
Fiddler 4.4.8.4
.NET Framework 4.5.2

Hello, 

I just installed Fiddler 4 on Windows 8 and when I run it I get a NullReferenceException at Fiddler.frmViewer.DoPostInitPreLoad(). There is a screen shot attached. I've been using Fiddler for years and this is the first time I've ever had a problem like this. I Googled the error but nothing seems to match. I'm really not sure how to proceed.

Any thoughts? Suggestions? 

Thanks, 

Mike

Hello,

Anyone had recent problems with a virus on fiddler 4.4.9.0?  I have been using fiddler as a proxy server to monitor web service traffic from several embedded devices that talk to my web service.  Recently I have been getting a flood of http packets from some unknown Chinese ip address.  I verified that somehow fiddler is the culprit by running wireshark and fiddler simultaneously.  When fiddler is running I start to get one or two Chinese ip address starting to hit my server.  Over time ( a few minutes ) it becomes a flood of http packets.  I record the chinese ip addresses with wireshark.  I then set the display filter in wireshark to trigger whenever one of these Chinese ip addresses hits the server.  When I run fiddler I get a flood of hits on wireshark.  When I shut down fiddler I get virtually no hits on wireshark.  The problem started a couple of weeks ago around the time when I upgraded fiddler 4.4.9.0.  However, I cannot be sure that the problem is due to 4.4.9.0.  I checked the location of the ip addresses using one of the popular web ip geolocators.  All them are originating from Shijianzhuang, Hebei, China.  The isp is China Unicom in Hebei.  Anyone else having the same problem?  Any fixes?  I will uninstall and re-download fiddler later today and see if the problem persists.

Best Regards,
Steve Mansfield 

I have been using 4.4.8 for a bit now.  I didn't do any config changes on it at all, has been working great.

I am debugging an app running on my local IIS set to run in SSL.  It makes calls out to web services on other machine and I use Fiddler to look at the SOAP in and out.

Today I saw the prompt so downloaded and installed 4.4.9.1 (by the way Symantic flagged it as being a possible threat, but I installed the file from Telerik.com)

After installing it all traffic for my application was showing as tunnel to... and nothing else. I searched around and found I needed to set it to decrypt the SSL, but I didn't have to do this with 4.4.8.

I can see the traffic for my app now, but I do not see the calls to the webservice.  The calls still happen, there's just nothing shown on Fiddler.

Again, this all just worked with 4.4.8, I had not needed to do any config changes.

I uninstalled 4.4.9.1 and reinstalled 4.4.8, but still the same.

Were there config changes made duning the install to 4.4.9.1?  How can I undo them so that I can see the SOAP calls again?

Hello,
Is it possible to install a official certificate (like a purshased VeriSign certificate) instead of the auto generated certifcate by fiddler ?
Thanks
Pascal

Hi! I've made a program on C# and it's work perfectly but stops on POST method to the page. When I use Fiddler as a proxy there is no errors. So I would like to know, what does fiddler to with my POST query so it works? What does Fiddler do with it.

Hi,
I'm pretty new to fiddler so I beg your pardon if I'm posting a silly (or well-known) question... but I searched cygWing and wget keywords without success

I tried to use Fiddler in a test environment, in order to capture Http traffic from a REST web-service application.
Test stimulus comes from a cygWin shell running a wget GET & POST requests, on a Win7 PC. The response is a plain json text.

Fiddler traces http traffic when I issue GET requests from Firefox and from Fiddler itself, but nothing gets tracked when I use Fiddler
with my test suites based on cygWin + wget.

In first place I'd like to know if I'm trying something out of the scope of Fiddler (e.g: because of cygWing+wget implementation, or some other reason).
If you tell me it should work, I'll invest in studying in more depth the topic and I'll find how to do....
....although any quick additional suggestion will  be welcome !

thanks in advance

So I have recently been struggling to get my .NET client working with mutual authentication. In the process of debugging with Fiddler, I noticed that if I make my public cert available to Fiddler, it adds it to the response I get from the server, and I am able to successfully complete my next request(instead of HTTP 401).

So my question is, what is the purpose of this functionality? Has someone experienced something similar?

The latest (and previous versions) of Fidler2setup.exe /S (for Silent) fail to install with Return Code 4444.

If there is a log I don't know where to find it and as NSIS is used there is no logging command line switch (a good enough reason to switch I'd have thought). A windows installer version would be much better (you could look at my free MAKEMSI tool, for easy command line msi building).

The required dot net version is installed:

ASoft .NET Version Detector Report
Download latest version at http://www.asoft.be

==== INFO ====
Created :2014/07/02 - 08:08:57
Computer:XD77038345AA0C

==== FOLDERS ====
<32Bit>
2.0.50727.42
  ->C:\WINNT\Microsoft.NET\Framework\v2.0.50727

==== Installed .NET Frameworks ====
.NET FW 2.0
==== END REPORT ====

Any ideas? Any other ways of installing it? I don't want to manually do it, has to be automated.