I have one specific browser instance that I have configured to always use fiddler, I turn on and off others as needed.   I'm doing development work and I want to see what's actually being sent back and forth, but, I really only care about my stuff.

I launch fiddler with my PC, and I have the "Capture traffic" turned off and the setting "Act as system proxy on startup" is not checked in the connections tab.

Other application on my system are still finding and using fiddler as it's proxy server, frequently causing failures.

How do I "hide" fiddler so that other systems like skype and google drive don't use it?   

It impacts me negatively in 3 ways. 

First, I only want to see traffic that I send to fiddler, I have to go out and delete a bunch of stuff.  I can remove them with filters and probably find a way to make my filters "stick" and survive reboot.   I'd have to research that.

Second and more importantly, I decrypt https, which fails on application that are not configured to use the self generated signatures.

Third, when I do shut down fiddler, the apps that have auto-detected it and configured themselves to use fiddler, still want to use fiddler.

I have a certain Android app that's not publicly available so you won't be able to fully troubleshoot, however I can explain the behavior I'm experiencing. 
When I attempt to use the app when  'Decrypt HTTPS Traffic' is disabled, the app works, but the data is encrypted and Fiddler prompts me to configure the settings.
When I enable 'Decrypt HTTPS Traffic' the app does not let me do anything and simply says 'network unavailable.' 
I did install the Android certificate. I tested on several other apps and don't appear to be experiencing the same problem. Any ideas on how I can further troubleshoot this?

the application url is here:

https://c.quizofkings.com/apks/QuizOfKingss-secure-direct-direct-6146.apk

 

I called CertMaker.createRootCert () returns false,

But I don't know what causes this situation?

How to solve this problem?

If createrootcert() fails, calling trustRootCert() will crash the application

Hello everyone!

I'm using fiddler to try and replace one js file with another. I've uploaded the js file to dropbox and created a link to it.

In the Fiddler ScriptEditor, under OnBeforeResponse, I've added the following code:

if (oSession.url==orig_url) { // literal url in code
    oSession.url = dropbox_url; // literal url in code
}

Loading the website that loads the js file I've noticed that no changes were made. I looked at the captured traffic in fiddler and see that indeed a request is made to dropbox_url but the response received is an old version of the file (incorrect Last-Modified header included). Copying the url from the captured request and putting it in my browser does indeed download the new version, so the problem isn't with the url itself.

I tried the Clear Cache button and Disable Caching under Rules->Performance but this odd behavior persists.

Does anyone have any idea why this is happening and how can I fix it?

Slightly unrelated, does anyone have a suggestion for a better approach to what I'm trying to do?

Thanks,

Neil

Hi there!

Could anyone, please, help with such a problem. All the traffic is being filtered with the unchecked "Use filters" in filter tab.

In the troubleshooting mode I can see the following comment "Hidden due to ToolBar > ProcessFilter"

 

As soon as I enable "Capture Traffic", Google Workspace (formerly G Suite)'s Gmail's Google Chat (the Workspace substitute for the free Gmail Hangouts) stops working. It just loads and messages don't go in and out.

 

This is even though my Fiddler's filters are very specific so they don't even show anything related to Google Chat.

 

Workspace's Gmail's Google Chat is a relatively new service. Until recently they used Hangouts just like the regular Gmail, so maybe it's something you've never considered.

Can you please solve it?

Thanks!

I had a user experience this issue. Fiddler was blocking Cisco AnyConnect VPN from running. When the user launched the Cisco AnyConnect client, the error showed as follows:

"The VPN connection is not allowed via a local proxy. This can be changed through AnyConnect profile settings."

The issue was Fiddler being set up to act as a system proxy on startup. To remedy this issue, open Fiddler, go into Tools > Options > Connections tab and uncheck 'Act as system proxy on startup' > click OK > exit and restart Fiddler. You should now be able to connect to Cisco AnyConnect.

If you had Fiddler installed and uninstalled it but still get this error, reinstall Fiddler and follow the instructions above. Once you confirm that you can reconnect to Cisco AnyConnect VPN, uninstall it.

 

Hello,

1. Could someone help me out How I can decrypt HTTPS on Windows7?

I have searched many online tutorials about this but they are not very helpful. And I have read your instruction about configure Fiddler. I don't understand that. I have checked the boxes on HTTPS tab (please see the screenshot.), and click 'Action', but it doesn't work for me.

2. I wonder where the 'winconfig' is. I am watching a video tutorial where there's a winconfig on the toolbar of the instructor, but I don't find it on my Fiddler.

 

Thank you very much!

 

 

I've created a Fiddler Everywhere account, but I can't get it to activate. I click the activation link as soon as I get the activation email, which is under a minute after I created my account or generate a new one by logging in again, but I get a message that my link has expired. I've also tried copying the mail and using it in a different browser and an incognito-mode browser, all with the same result.  

Hello,
I'm using Fiddler to check hits from my android. My computer and mobile are well connected and I can see hits from my mobile on Fiddler interface, however the internet connexion is quickly or automatically lost on mobile. Do you have any idea why ? Is there a way to solve this problem ?
Thank you for your help, 
Regards, 
Nicolas