I did a load test performance for an application, and sends many requests to the server through different concurrent users. Some requests failed and returned 504. However, I'm wondering about the time factors, and don't understand the followings:

A) There is an elapsed time about 1 minute between ClientDoneRequest and ServerConnected. I try to understand why I experience this 1 minute gap, what indicates, and how to interpret it/

1) ClientDoneRequest:13:06:11.336

2) ServerConnected:13:07:11.241

 

B) The other question is that the serverConnected is later than ServerBeginResponse! How is it possible?

1) ServerConnected:13:07:11.241

2) ServerBeginResponse:13:07:11.134

I copied the entire timing below:

 

NOTE: This request was retried after a Receive operation failed.

ClientConnected:13:04:28.914
ClientBeginRequest:13:06:10.972
GotRequestHeaders:13:06:10.972
ClientDoneRequest:13:06:11.336
Determine Gateway:0ms
DNS Lookup: 0ms
TCP/IP Connect:0ms
HTTPS Handshake:52ms
ServerConnected:13:07:11.241
FiddlerBeginRequest:13:07:11.294
ServerGotRequest:13:07:11.294
ServerBeginResponse:13:07:11.134
GotResponseHeaders:00:00:00.000
ServerDoneResponse:13:08:19.817
ClientBeginResponse:13:08:19.819
ClientDoneResponse:13:08:19.819

Overall Elapsed:0:02:08.846

I have attempted to figure out this problem but cannot determine what the root cause is. Basically, I am receiving a "ReadResponse()failed: The server did not return a complete response for this request. Server returned 0 bytes." message when I perform a basic GET. In the log it shows "fiddler.network.readresponse.failure> Session #9853 raised exception System.IO.IOException The read operation failed, see inner exception. < A call to SSPI failed, see inner exception"

This only started occurring after I updated the Cipher Suites which are supported on the web server. Below are the Cipher Suites that work and the ones that don't. It seems that Fiddler needs a DES option to be available for some reason but even when I remove just one of the ciphers that use DES, the failure occurs.

Working Cipher Suite:

ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA:ECDHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA256:DHE-RSA-AES256-SHA:ECDHE-ECDSA-DES-CBC3-SHA:ECDHE-RSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:DES-CBC3-SHA:!DSS

Non-Working Cipher Suite:

ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA:ECDHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA256:DHE-RSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:!DSS

 

On the web server, I see an error that states "Re-negotiation handshake failed: Not accepted by client!?". I can access the site fine through a web browser and using the first set of cipher suites but cannot with the second. Do you have any idea why removing just one of the DES suites causes this issue? 

Hello.

 

I hope you can help me. there is this page. espnganatelcel.com

every time I try to debugg with fiddler, the server refuses to connect. I tried every trick I searched about certificates but nothing. How do they accomplish that?

I hope some can help me out, I´m running fiddler ver. v5.0.20173.49666 for .NET 4

thanks.

Armando.

I was trying to watch all the Google Analytics HTTPS traffic from an Android App but it's impossible. 

All the recommended settings on http://docs.telerik.com/fiddler/Configure-Fiddler/Tasks/ConfigureForAndroid were done. 

The smartphone barely connect to the network even though the settings are ok and well configured. 

Sometimes when it     

Hello,

I am using Fiddler in my home lab to see what encrypted traffic do my programs/apps send over internet. Fiddler is running under windows 10 on a dedicated machine. I have 2 client machines that use Fiddler as a remote proxy, one desktop with Windows 10 and one wireless smartphone with Android 7.1.1. Except for a few programs/apps (e.g. Viber, Skype), everything works fine. One of the main problems is that Android thinks it is offline. I could browse internet but PlayStore seems to be unable to download apps. So I decided to add some google hostnames to the proxy bypass list to see if this solves the problem. It seems that this list has no effect when Fiddler is running as a remote proxy.

Question 1: Is this how it is supposed to work or am I doing something wrong?

Another problem is memory usage: on the dedicated Fiddler machine I have upgraded from 6 to 8 GB RAM. It seems Fiddler uses nearly all RAM although I have limited the number of sessions to the minimal available (10000).

Question 2: Can I somehow tell Fiddler (using a script) to use e.g. only 6 GB?

 

I am using the latest Fiddler version.

---------------------------
Folder Creation Failed
---------------------------
Fiddler has encountered an unexpected problem. If you believe this is a bug in Fiddler, please copy this message by hitting CTRL+C, and submit a bug report at http://www.telerik.com/forums/fiddler.

Nicht genügend Quoten verfügbar, um diesen Befehl zu verarbeiten.



Type: System.IO.IOException
Source: mscorlib
   bei System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)

   bei System.IO.Directory.InternalCreateDirectory(String fullPath, String path, Object dirSecurityObj, Boolean checkHost)

   bei System.IO.Directory.InternalCreateDirectoryHelper(String path, Boolean checkHost)

   bei Fiddler.CONFIG.() in C:\JenkinsHome\jobs\FiddlerReleaseBuild\workspace\Fiddler2\Common\Application\Config.cs:Zeile 1687.


Fiddler v5.0.20173.50948 (x64 AMD64) [.NET 4.0.30319.42000 on Microsoft Windows NT 6.3.9600.0]
---------------------------
OK   
---------------------------

Hi, 

I got 2 problems regarding Fiddler on mobile : 

The first one is the certificate. I made the configurations on my phone but I still can't download the certificate on this address:

http://ipv4.fiddler:8888/ (Device : Samsung S8)

Then, I changed my mobile with another one who already got the certificate, but here is the second issue: I cannot get my hits on Fiddler interface. All of them are secured with a lock "443". 

 

Many thanks in advance, 

Lydia.

When opening Fiddler, it kept hanging on the "Creating proxy..." step of the initial splash screen and wouldn't load. So, I tried to uninstall and reinstall it, and I keep getting an error (screenshot attached) during the install process (and, also during the uninstall process). It won't run at all now, I'm not sure if it's a Telerik issue or an issue with my computer (this isn't the first issue I've had in the past couple of days with my computer). 

Hi .I just started leaning Web API. When I created an API , run visual studio and took fiddler to test different methods(Get,Put..) , I couldn't find my url  in the fiddler feed, but traffics are created continuously and when i cleared all the traffic ,again this automatic adding happens endless.Please advise what should I do to get rid of this,or I have to change any settings. Thnaks in Advance.

Unfortunately the new version 4.6.20172.31233 of Fiddler always installs to the users folder under C:\Users\alias\AppData\Local\Programs\Fiddler

What can I do to install the new version 4.6.20172.31233 silently to c:\program files again?

Thank you!

Fabian