Checking for updates has been disabled since the day I installed Fiddler, so I'm not sure why this is occurring.

 

---------------------------
Awww, Fiddlesticks!
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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.

VersionCheckFailed: Server Response Code = 301

Type: System.IO.InvalidDataException
Source: Fiddler
   at Fiddler.Updater.GetLatestVersion(Boolean includeBetaVersions, Boolean isEmergencyCall)

   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)

   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)

   at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem()

   at System.Threading.ThreadPoolWorkQueue.Dispatch()


Fiddler v4.6.2.3 (x64 AMD64) [.NET 4.0.30319.42000 on Microsoft Windows NT 10.0.10586.0] 
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OK   
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Hello,

Error appearing when I start fiddler via Terminal 'mono fiddler.exe'

Fiddler is running however not able to catch calls.

Prior opening the app an error pops up. (please see the attachment)

 

Thank you

Hi,

Navigate to Tools > Telerik Fiddler Options > HTTPS> Actions > drop down.

There you'll an enabled option to "Open Windows Certification Manager". Not really, on Linux or at least not a Windows one. You can choose and click the option which then results in the following output on the console:


Running Fiddler v4.6.3.51842 on Ubuntu 16.04 with Xfce4 window manager.


Regards, JoKi

Please help!

I've disabled every firewall I could, and did everything a admin commented on a other post but did not work! 

I'm using Chorme and i'm getting pissed, I tried to trust it but it came out with the error. 

If you can please help me.

Thanks - Kyoto

Hello,

I've been using Fiddler for a few months now and have recently started going through the OWASP Security Shepherd testing challenges.

In one of the challenges - Session Management Challenge One - one has to fiddle with the header, change something to get a string returned which shows success for this challenge. The problem I'm seeing is that Fiddler does not let this response through but TamperData does. I eliminated other factors like browser, etc and it seems to be a Fiddler issue and I'd like to understand why that is.

Once the POST request is sent, Fiddler returns response with a length of 0. TamperData returns a response with a length of 713. I attached screenshots for both and and have the session from Fiddler if that is needed.

If someone could let me know if there's anything that I'm doing wrong to prevent Fiddler from returning that response, please do let me know. On that point, there are NO filters and no rules set up in Fiddler.

Thanks for your help in advance!

I have a wpad script in Internet Option (Windows 7) that returns DIRECT for local IPs and addresses and returns one of two different proxy address depending on the destination.

This is my wpad.dat:

function FindProxyForURL(url, host) {

var direct = "DIRECT";
var proxy1 = "PROXY pfsense:3128";
var proxy2 = "PROXY e2guardian:8080";

if (isPlainHostName(host) ||
    shExpMatch(host, "*.local") ||    
    isInNet(dnsResolve(host), "192.168.1.0",  "255.255.255.0") ||
    isInNet(dnsResolve(host), "192.168.0.0",  "255.255.255.0") ||    
    isInNet(dnsResolve(host), "127.0.0.0", "255.255.255.0") ||
    isInNet(dnsResolve(host), "184.168.27.41", "255.255.255.0"))
    return direct;

if (dnsDomainIs(host, "logmeinrescue.com") || dnsDomainIs(host, "logmeinrescue-enterprise.com"))
    return proxy1;

if (dnsDomainIs(host, "microsoft.com") || dnsDomainIs(host, "windowsupdate.com"))
    return proxy1;

return proxy2;

}

I need to find which value it returns during each session/connection.  How do I do that with Fiddler 4?

I suspect that Windows is doing some caching or the application (Logmein Rescue) requesting access is using a unknown address.

 

Just for information:  e2guardian proxy is a content filtering server with SSL MITM protocol, which is not compatible with Logmein. pfsense proxy is a regular squid server.  When I set the proxy static to pfsense the application works correctly while using e2guardian fails.  So something during the application session is going to the wrong proxy. 

Hello,

I am trying to create iis webdav, request/response from this website is not managed when I try to use webDAV.

I am newbie to fiddler. Please help..

In fiddler core's new versions (4.6.3.50306) i can't able to get all the preferences (especially "fiddler.certmaker.bc.cert" & "fiddler.certmaker.bc.key") but in the old version (i.e. 4.5.1) its working fine.

Code:
FiddlerApplication.Prefs.GetStringPref("fiddler.certmaker.bc.cert", null));

FiddlerApplication.Prefs.GetStringPref("fiddler.certmaker.bc.key", null));

Evenin the fiddler application's preference list these two preferences are missing

Hi,

In order to copy the Fiddler version details from the About dialog, I got the following stack trace output in the console:

 

Eventually, this might be a Mono related problem. I'm running on Ubuntu 16.04 with latest Xamarin Mono packages:

 

Kind regards, JoKi

Hi,

The current About dialog provides a scrollable area for version and system information. By increasing the height by ~20px this could be avoided.

Please see attached screenshot. Thanks.

 

Regards, JoKi