Hello,

I'd like to monitor traffic generated by an android app. The app is only sending part of the traffic through the default android proxy (which is set up on the wireless connection as documented on http://docs.telerik.com/fiddler/configure-fiddler/tasks/ConfigureForAndroid). However, I also want to monitor the part that is not going through the default android proxy.
How can this be achieved? Maybe by using iptables?

Hi,

Error --> ERR_TUNNEL_CONNECTION_FAILED

gets displayed on some https sites.

e.g. try the following url-

https://www.irctc.co.in/
https://www.virtuallythere.com/new/

Kindly suggest.

When using fiddlercore as web proxy in a WPF application and accessing web pages through a web browser control,  there are multiple socket exceptions thrown. When fiddler is turned off, we do not see these exceptions.

Fiddler start code snippet:
 const FiddlerCoreStartupFlags Flags = FiddlerCoreStartupFlags.Default;

            if (!FiddlerApplication.IsStarted())
            {
                FiddlerApplication.Startup(PortNumber, Flags);
            }

Fiddler shutdown snippet:
if (!FiddlerApplication.IsStarted())
            {
                return;
            }


            FiddlerApplication.BeforeRequest -= this.OnBeforeRequest;
            FiddlerApplication.ResponseHeadersAvailable -= this.OnResponseHeadersAvailable;

            FiddlerApplication.Shutdown();
            Thread.Sleep(TimeoutMilliseconds);

Below was the exception analysis using Windbg on a dump created:

Exception object: 0388db20
Exception type:   System.Net.Sockets.SocketException
Message:          An existing connection was forcibly closed by the remote host
InnerException:   <none>
StackTrace (generated):
    SP       IP       Function
    125EEA10 72C5D2F8 System_ni!System.Net.Sockets.Socket.Send(Byte[], Int32, Int32, System.Net.Sockets.SocketFlags)+0x6375e8
    125EEA30 0CEB335D UNKNOWN!Fiddler.BasePipe.Send(Byte[], Int32, Int32)+0x85
    125EEA50 0CEB51EA UNKNOWN!Fiddler.ServerChatter.LeakResponseBytes()+0xfa

StackTraceString: <none>
HResult: 80004005
*************
Exception object: 038ba308
Exception type:   System.Net.Sockets.SocketException
Message:          An existing connection was forcibly closed by the remote host
InnerException:   <none>
StackTrace (generated):
    SP       IP       Function
    0A7FF090 72C5D2F8 System_ni!System.Net.Sockets.Socket.Send(Byte[], Int32, Int32, System.Net.Sockets.SocketFlags)+0x6375e8
    0A7FF0B0 0CEB335D UNKNOWN!Fiddler.BasePipe.Send(Byte[], Int32, Int32)+0x85
    0A7FF0D0 0CEB51EA UNKNOWN!Fiddler.ServerChatter.LeakResponseBytes()+0xfa

StackTraceString: <none>
HResult: 80004005
*************
Exception object: 0390bf54
Exception type:   System.Net.Sockets.SocketException
Message:          An existing connection was forcibly closed by the remote host
InnerException:   <none>
StackTrace (generated):
    SP       IP       Function
    0674F2E4 72C5D2F8 System_ni!System.Net.Sockets.Socket.Send(Byte[], Int32, Int32, System.Net.Sockets.SocketFlags)+0x6375e8

StackTraceString: <none>
HResult: 80004005
*************
0:008>
Exception object: 03876124
Exception type:   System.Net.Sockets.SocketException
Message:          An existing connection was forcibly closed by the remote host
InnerException:   <none>
StackTrace (generated):
    SP       IP       Function
    0660F350 72C5D2F8 System_ni!System.Net.Sockets.Socket.Send(Byte[], Int32, Int32, System.Net.Sockets.SocketFlags)+0x6375e8
    0660F370 0CEB335D UNKNOWN!Fiddler.BasePipe.Send(Byte[], Int32, Int32)+0x85
    0660F390 0CEB51EA UNKNOWN!Fiddler.ServerChatter.LeakResponseBytes()+0xfa

StackTraceString: <none>
HResult: 80004005
*************
Exception object: 0388db20
Exception type:   System.Net.Sockets.SocketException
Message:          An existing connection was forcibly closed by the remote host
InnerException:   <none>
StackTrace (generated):
    SP       IP       Function
    125EEA10 72C5D2F8 System_ni!System.Net.Sockets.Socket.Send(Byte[], Int32, Int32, System.Net.Sockets.SocketFlags)+0x6375e8
    125EEA30 0CEB335D UNKNOWN!Fiddler.BasePipe.Send(Byte[], Int32, Int32)+0x85
    125EEA50 0CEB51EA UNKNOWN!Fiddler.ServerChatter.LeakResponseBytes()+0xfa

StackTraceString: <none>
HResult: 80004005
*************
Exception object: 038ba308
Exception type:   System.Net.Sockets.SocketException
Message:          An existing connection was forcibly closed by the remote host
InnerException:   <none>
StackTrace (generated):
    SP       IP       Function
    0A7FF090 72C5D2F8 System_ni!System.Net.Sockets.Socket.Send(Byte[], Int32, Int32, System.Net.Sockets.SocketFlags)+0x6375e8
    0A7FF0B0 0CEB335D UNKNOWN!Fiddler.BasePipe.Send(Byte[], Int32, Int32)+0x85
    0A7FF0D0 0CEB51EA UNKNOWN!Fiddler.ServerChatter.LeakResponseBytes()+0xfa

StackTraceString: <none>
HResult: 80004005
*************
Exception object: 0390bf54
Exception type:   System.Net.Sockets.SocketException
Message:          An existing connection was forcibly closed by the remote host
InnerException:   <none>
StackTrace (generated):
    SP       IP       Function
    0674F2E4 72C5D2F8 System_ni!System.Net.Sockets.Socket.Send(Byte[], Int32, Int32, System.Net.Sockets.SocketFlags)+0x6375e8

StackTraceString: <none>
HResult: 80004005

From http://www.enhanceie.com/Fiddler/help/httpsdecryption.asp, it says, 
if you've configured Fiddler to proxy traffic from a second computer or device...
but that URL (http://www.fiddler2.com/fiddler/help/hookup.asp#Q-NonWindows) is invalid, not actually linking to any specific article. 

Can we have the new url or a quick share of the steps please? 

Thanks

Rule Config

regex:(?insx)\/0Pl5sssO4/.+\.js$ #Versafe.js
C:\Users\chernyakov\Desktop\versafe\static.js

I would expect Autoresponder to respond with file contents. Instead, it rewrites my request 



GET http://xx.xx.43.176C:\Users\chernyakov\Desktop\script\static.js/ HTTP/1.1
Host: Xx.xx.43.176C:\Users\chernyakov\Desktop\script\static.js
Proxy-Connection: keep-alive
Pragma: no-cache
Cache-Control: no-cache
Accept: */*

So I want to modify a standard Http 200 response from a server, which contains headers and an image in the responsebody. I want to selectively replace that image (ideally from  a stored image file; but the actual image will change over time and/or I want to select different images based on logic). I want to retain the original headers from the server response, and replace the responsebody image. I would use the OnBeforeResponse event to trap the response. The images are standard files (image file only, no http headers).

I see I can load an entire response from a file with FildderScript, but I can't see how to load just the responsebody from a file (binary image jpg/or png or gif). I thought possibly I could populate an array from the image file, and then use ResponseBody:System.Byte[] call to attach the image (and fix up the headers associated with the size/content type etc).

I have searched far and wide but haven't found any related example FiddlerScript for this operation. Could you post a snippet along these lines?

Yes I have tried resetting IE settings
Yes I have disabled and re-enabled IE
Yes I have tried the following steps:
1: Use Help > Troubleshoot Filters to make sure the traffic isn't getting hidden unexpectedly. --Nothing hidden
2: Look in the Log tab to see if there's a note about Chrome Group Policy hardcoding the proxy. --Recently set Chrome Policy to try and fix the issue. Not problematic
3: Update your question to mention whether other browsers' traffic is captured. --Nothing is captured except for Echo Service
4: Visit http://localhost.fiddler:8888/ in Chrome; What if anything do you see? --Echo Service
5: Visit http://127.0.0.1:8888/ in Chrome; What if anything do you see? --Echo Service
I have also tried to manually modify the registry settings. The result was Fiddler overriding them. I have tried process monitor, nothing is being captured at all.
After setting the Chrome Policy, it works, for Chrome anyways. I have disabled EVERY Chrome expansion. Nothing. I have also deleted Registry Keys, nothing.
I have crashed Windows trying to fix this, believe me I went in-depth. I have uninstalled the following as well to try:
1: Evolve VPN
2: Teamviewer VPN
3: Wireshark
4: WinPCap
5: Fiddler (Reinstalled)
6: CommView
With the exception of Fiddler, I have reinstalled nothing above. I do have Hamachi VPN installed, but I know it works for that. Note I am having the same exact issue on another laptop, meaning it is not entirely unique. The registry override ONLY occurs when refreshing Fiddler after registry change. I am ready to post any files I need.

Hello,
I am new to using Fiddler Web Debugger.  How do I measure performance of a website with the application?  Can you provide the basics? 

I see this in the right hand side when a page is loaded up.  In there anymore to performance tools that Fiddler Web Debugger has?

Requests started at:  36:56.8
Responses completed at:  36:58.2
Sequence (clock) duration:  00:01.4
Aggregate Session duration: 00:01.5
 TCP/IP Connect duration: 10ms
 

Rule Config

regex:(?insx)\/0Pl5sssO4/.+\.js$ #Versafe.js
C:\Users\chernyakov\Desktop\versafe\static.js

I would expect Autoresponder to respond with file contents. Instead, it rewrites my request 



GET http://xx.xx.43.176C:\Users\chernyakov\Desktop\script\static.js/ HTTP/1.1
Host: Xx.xx.43.176C:\Users\chernyakov\Desktop\script\static.js
Proxy-Connection: keep-alive
Pragma: no-cache
Cache-Control: no-cache
Accept: */*

Rule: regex:(?insx)\/0Pl5sssO4/.+\.js$ #script.js
and selected a file on a file system in the second combo-box 

I would expect that the AutoResponder would respond with the file contents, instead, it rewrites URLs to 

GET http://XX.XX.43.176C:\Users\chernyakov\Desktop\script\static.js/ HTTP/1.1
Host: XX.XX.43.176C:\Users\chernyakov\Desktop\script\static.js

All other headers are seem to be fine 

Is that a bug, or I am configuring it wrong ?