I've just downloaded the latest Fiddler2 and put it onto my PC. I admit that I'm not a Fiddler guru, but I know enough to use it somewhat. I'm trying to determine what's going on with one of our websites, so I downloaded the latest Fiddler2, installed it and fired it up. Then I brought up my browser (IE11 on Windows 7 Ultimate, 64-bit). The website is protected with SSL, and so when I went to look at the header information Fiddler immediate told me that it was encrypted, but that it could decrypt it. I told it to do so, and then I started getting these popup messages from Fiddler2, over and over again. I don't know what to do about it, so help!

I'm seeing response text like this:

fiddler.network.https> Failed to secure existing connection for <url> . A call to SSPI failed, see inner exception. InnerException: System.ComponentModel.Win32Exception: The token supplied to the function is invalid

The server is Tomcat.

Fiddler v2.4.6.2

Thx,
Ed

Can Fiddler capture live network traffic like TShark does? I am interested in data that is encrypted with SSL. I see that Fiddler can decrypt it.

Like:
c:\wireshark\>tshark -i 1 -R "ip.src == ip_address_here" -T fields -e data.data -l

can i use process.Start() and process.WaitForExit() ?
i need to create log with external program
now i want to use process.start to start the program and process.WaitForExit to wait for the program

BPU bootstrap.css correctly breaks on bootstrap. But when I "Break on Response", click the Raw tab, delete the contents, then run to completion, fiddler sends all of the CSS. You can verify it restores the CSS by deleting it, then click another tab , then click back the Raw tab, the CSS is restored. Furthermore, fiddler shows it sent the entire bootstrap.

"Choose Response" always works correctly (tampers the response).

If you enter a dozen newlines and some text (asdflj)  in the RAW tab, click another tab, then click RAW,  it will retain the tampering then display:

HTTP/1.1 200 OK
Content-Type: text/css
Last-Modified: Fri, 11 Oct 2013 00:27:46 GMT
Accept-Ranges: bytes
ETag: "0ad16b518c6ce1:0"
Vary: Accept-Encoding
Server: Microsoft-IIS/8.0
X-SourceFiles: =?UTF-8?B?Rjpccm1cTXZjTW92aWVSVE1cTXZjTW92aWVSVE1cTXZjTW92aWVcQ29udGVudFxib290c3RyYXAuY3Nz?=
X-Powered-By: ASP.NET
Date: Tue, 11 Mar 2014 03:07:08 GMT
Content-Length: 22






asdflj

I've repro'd this on two Win 8.1 boxes with Fiddler Web Debugger (v4.4.6.2)

Hi

I want to know how to block URL's using Fiddler Proxy
Fiddler Proxy is installed in my machine. And from same machine i need this Fiddler proxy to block requests to google domain URL's and rest all domains should work fine.

Thanks,
Karthik

Hello,
I've got a strange behavior of fiddler...I was debugging a wpf application that uses ServiceStack to access data.... and I've told to compress data with deflate... checking from chrome,ie,ffox I got my data compressed...in fiddler it seems the data arrives uncompressed...is this a common behavior? does fiddler 2 uncompress it and shows it in the response header as uncompressed?
Thanks

I have a coworker who sends me fiddler logs from their session to help them diagnose the issue.  When I attempt to open the file I see the error in the attached image but when opening the file on coworker's computer there is no problem.  The user sends me the fiddler log via e-mail.  Any help would be appreciated.

Who changed fiddler's favicon to the ugly lime f! Please change to something more pleasing!

Can't seem to get it to capture any session data.  Also noticed that browsers, either IE64 or FireFox 27.0.1, lock up and won't display a page, until I kill Fillder and then they work again.  (I'm getting pages from localhost and elsewhere). 

I haven't tried Fiddler much, so don't have much experience with it.  Also I just downloaded the new version.  My win7 and browsers are up to date.