I tried to run Fiddler on Windows Server 2003, and it just will not load.

Does it run or do we need to load anything else on our Windows 2003 R2 x64 server?

It is loading fine on Windows 2008 R2 X64, but not Windows 2003.

 

I'm using fiddlercore to do some website traffic tests.  Basically, the tests go to a website and verify some http requests were made.  I have a number of different tests that do this across many different websites.  I'm using a test framework that supports parallelism (Nunit 3.0), so I want to be able to run my tests in parallel, but still keep the traffic from each thread separate.  I'm not sure how to do this with fiddlercore, as I can't just give it a process to watch because all of the threads are from the same process.

Whenever I close Fiddler, the SSL protocols I have selected under Tools > Fiddler Options... > HTTPS > Enabled Protocols are forgotten, so the next time I start the app, it defaults to SSL3 only. Is this a bug or a feature, and if the latter, why?

Hi Telerik Team,

Thanks for creating Fiddler. It is an awesome and useful product.

I am using Fiddler 4.6.0.2 on Windows 8.1. I am trying to monitor some traffic from my android mobile. I am able to fetch the HTTP traffic flawlessly but i have issues with HTTPS traffic. My requests says HTTPS handshake failed.

I have tried changing the port and removing/installing the certificate again. But it hasn't helped me.

Here's the log:

22:13:15:2555 [Fiddler] No HTTPS request was received from () new client socket, port 60376.
22:13:15:2711 [Fiddler] No HTTPS request was received from () new client socket, port 60374.
22:13:15:3022 [Fiddler] No HTTPS request was received from () new client socket, port 60373.
22:13:15:3178 [Fiddler] No HTTPS request was received from () new client socket, port 60375.
22:13:15:4268 [Fiddler] No HTTPS request was received from () new client socket, port 60377.
22:13:18:9190 fiddler.network.https> HTTPS handshake to www.olacabs.com (for #461) failed. System.Security.Authentication.AuthenticationException A call to SSPI failed, see inner exception. < The Local Security Authority cannot be contacted

Win32 (SChannel) Native Error Code: 0x80090304
22:13:48:4931 fiddler.network.https> HTTPS handshake to www.olacabs.com (for #465) failed. System.Security.Authentication.AuthenticationException A call to SSPI failed, see inner exception. < The Local Security Authority cannot be contacted

Win32 (SChannel) Native Error Code: 0x80090304
22:13:48:5243 fiddler.network.https> HTTPS handshake to www.olacabs.com (for #466) failed. System.Security.Authentication.AuthenticationException A call to SSPI failed, see inner exception. < The Local Security Authority cannot be contacted

Win32 (SChannel) Native Error Code: 0x80090304

Please help me to resolve the issue.

I have also attached the screenshots in case it helps.

​

I have Windows 7 6bit. Fiddler 2 fresh install, no scripts, filters are off, https capturing/decryption enabled, certificate exported and installed/stored under Trusted Root Certification Authorities. Tried with Chrome and Firefox.

 When I browse  2 sites from internet that both use https and are constantly communicating with fresh data (page itself is not fully reloaded, only data within) probably with jQuery/API in JSON/XML format from the server then one site data communication is captured and the other not. I captured same site data communication over the year ago with success and without any tricks (except allowing https capture/decryption in Fiddler). From visible side the site has not changed.

 If anyone interested testing then:

https://ee.olybet.com/en/Sports/?method=PreMatch

go to LIVEBET, pick one ongoing event and wait the data communication (red/green arrows will appear)

I am very thankful for any hint.

Greetings,

I work in the desktop support portion of my company, and I have been tasked with finding out whether various applications in our environment require local administrator rights after initial install and configuration.  Searching through the documentation on this site and through Google, I was unable to locate whether there were certain functions inside of Fiddler that did require administrator rights.  I was hoping someone here would have an experience trying to use Fiddler without local admin rights that they could share.  Thanks!

 

Hi

I would like to export in a file the timers of a session.

When I select the timer ClientDoneResponse in the Fiddler interface, I can see the milliseconds. But in my script, when I retrieve this value with : oSessions[x].Timers.ClientDoneResponse, I can't see them (ie. screenshot).

Any ideas ?

 

Thanks.

Hi,

 I'm trying to remove the "Accept-Ranges" header before sending the response back to the client and I've added

oSession.oResponse.headers.Remove("Accept-Ranges");

to the OnBeforeResponse but it's not working (i.e. I still see the header in the response to the client).  I'm accessing a direct link to download the file. Something like:

http://acme.com/file1.dat

Thanks,

Blanco

 ​

Hi All,

I am running fiddler as a proxy so that I can debug a webview on a mobile device. However when I run fiddler, it takes over my proxy settings (as expected) but never releases them. It adds certificates to my personal certs that are flagged as fiddler and it also modifies my proxy settings so even when it is not running, it says that I my system administrator has set my system to not allow me to change. After running Malware Bytes, I am able again to change my proxy settings.

This only happens after I run fiddler. Also this makes it such that I need to run Fiddler to do any localhost development on a web site. If I uninstall fiddler, remove the extra certs, and use Malware Bytes to remove the registry changes that it modifies, then I can run my localhost without fiddler. I am seriously considering that there is something extra wrong here but I think I will have to get a different proxy system.

Any ideas?

Thanks,
Brian

First, just want to say that Fiddler is a great tool and I appreciate the work done to create it and to support it.

I am after an old version of Fiddler that only requires .NET 1.1.  Judging by the release history page, the last version of Fiddler 1.x was 1.3.0.0, released on 6/1/07, so that would be my preference.  I understand this version is very old and no longer supported, but I have one specific issue I am trying to troubleshoot and it is on a computer that only has .NET 1.1.  I don't have the option to upgrade .NET to a newer version on it, so I am hoping Eric L. can help me out.  :-)

Thanks again,

Brad