hi
I'm use fiddler "everywhere enterprise"
I'm having trouble with proxy connection after setting up VPN on Android.

[Pre-Condition]
 - PC: Mac OS / WindowOS
 - VPN App: Global Protect
 - Device setup: CA installed in PC / Android ddvice (No VPN setup) / Set the device to the same proxy information as the PC

[Check]
 - iOS
     > set up VPN > Proxy connection is successful and traiffc checked               << Pass
     > Proxy connection is successful and traiffc checked > can set up VPN        << Pass 

 - AOS
     > No VPN setup > Proxy connection is successful                                            << Pass
     > setup VPN > Proxy connection is successful but cannot traiffc check        << Fail
     > Proxy connection is successful and traiffc checked > cannot setup VPN   << Fail
          - VPN app Fail comment:  could not verify the server cerificate of the gateway / if the issue persists, contact your administrator



Please help
thank you!

I have a certain iOS 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 iOS 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?

 

Thank you.

 

 

 

I tried loading a page in the Fiddler Browser, there is about 21 cookies

 

When I use the inspector, and filter by cookie, I find only creation of 4 or so cookies.

I am trying to find the JS creating the rest

When I try to check the body using the Fiddler Proxy on a particular website, I can find the body value in fiddler session list. But when I try to check body on Fiddler Script, the body value is checked as "".
I checked the session list that the body value is more than 260000 characters, but the Fiddler Script confirms it as 0 characters.

Here is example

This code contained in onBeforeResponse

```

var oBody = System.Text.Encoding.UTF8.GetString(oSession.responseBodyBytes);

```

And here is the url of that particular website.

https://m.cgv.co.kr/

I've using fiddler more than 1 years, but this is the first case of this phenomenon. I'd appreciate it if you could tell me how to do it

 

 

 

I have a user rinoing Windows 11 23h2 Fiddler everywherehas not been able to load past the splash screen.  I've tried cleanring the cashe, reinstall etc and  after several re-installs the Fiddler everywhere v5.18 wont load at all now.  Here are the details from the electron.log:

I'm not sure what the unhandled exception is referring to and you guidance would be greatly appreciated

2024-09-24 11:12:06:225] [info] [Product information] Fiddler Everywhere 5.17.0
[2024-09-24 11:12:06:230] [info] [System information] win32 (Windows_NT/x64) - version 10.0.22631
[2024-09-24 11:12:06:285] [info] Initializing splash screen.
[2024-09-24 11:12:06:488] [info] Ensure no running cleanup nodejs and cleanup .net processes.
[2024-09-24 11:12:06:774] [info] Displaying splash screen.
[2024-09-24 11:12:30:989] [error] Unhandled exception: TypeError: Cannot read properties of undefined (reading 'trim')
    at C:\Users\username\main.js:85:4480)
    at ChildProcess.emit (node:events:519:28)
    at maybeClose (node:internal/child_process:1105:16)
    at ChildProcess._handle.onexit (node:internal/child_process:305:5)
[2024-09-24 11:20:26:463] [info] [Product information] Fiddler Everywhere 5.17.0
[2024-09-24 11:20:26:467] [info] [System information] win32 (Windows_NT/x64) - version 10.0.22631
[2024-09-24 11:20:26:524] [info] Initializing splash screen.
[2024-09-24 11:20:26:631] [info] Ensure no running cleanup nodejs and cleanup .net processes.
[2024-09-24 11:20:26:906] [info] Displaying splash screen.
[2024-09-24 11:20:45:287] [error] Unhandled exception: TypeError: Cannot read properties of undefined (reading 'trim')
    at C:\Users\username\main.js:85:4480)
    at ChildProcess.emit (node:events:519:28)
    at maybeClose (node:internal/child_process:1105:16)
    at ChildProcess._handle.onexit (node:internal/child_process:305:5)
[2024-10-02 10:17:31:159] [info] [Product information] Fiddler Everywhere 5.17.0
[2024-10-02 10:17:31:164] [info] [System information] win32 (Windows_NT/x64) - version 10.0.22631
[2024-10-02 10:17:31:208] [info] Initializing splash screen.
[2024-10-02 10:17:31:306] [info] Ensure no running cleanup nodejs and cleanup .net processes.
[2024-10-02 10:17:31:657] [info] Displaying splash screen.
[2024-10-02 10:18:03:416] [error] Unhandled exception: TypeError: Cannot read properties of undefined (reading 'trim')
    at C:\Users\username\main.js:85:4480)
    at ChildProcess.emit (node:events:519:28)
    at maybeClose (node:internal/child_process:1105:16)
    at ChildProcess._handle.onexit (node:internal/child_process:305:5)
[2024-10-02 12:21:09:225] [info] [Product information] Fiddler Everywhere 5.18.0
[2024-10-02 12:21:09:229] [info] [System information] win32 (Windows_NT/x64) - version 10.0.22631
[2024-10-02 12:21:09:296] [info] Initializing splash screen.
[2024-10-02 12:21:09:457] [info] Ensure no running cleanup nodejs and cleanup .net processes.
[2024-10-02 12:21:09:817] [info] Displaying splash screen.
[2024-10-02 12:21:40:602] [error] Unhandled exception: TypeError: Cannot read properties of undefined (reading 'trim')
    at C:\Users\username\main.js:85:4480)
    at ChildProcess.emit (node:events:519:28)
    at maybeClose (node:internal/child_process:1105:16)
    at ChildProcess._handle.onexit (node:internal/child_process:305:5)
[2024-10-02 12:24:16:592] [info] [Product information] Fiddler Everywhere 5.18.0
[2024-10-02 12:24:16:595] [info] [System information] win32 (Windows_NT/x64) - version 10.0.22631
[2024-10-02 12:24:16:644] [info] Initializing splash screen.
[2024-10-02 12:24:16:777] [info] Ensure no running cleanup nodejs and cleanup .net processes.
[2024-10-02 12:24:16:988] [info] Displaying splash screen.
[2024-10-02 12:24:45:610] [error] Unhandled exception: TypeError: Cannot read properties of undefined (reading 'trim')
    at C:\Users\username\main.js:85:4480)
    at ChildProcess.emit (node:events:519:28)
    at maybeClose (node:internal/child_process:1105:16)
    at ChildProcess._handle.onexit (node:internal/child_process:305:5)

can not find“System.Xml, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089”

I am developing a Chrome extension that activates a proxy. When I enable the VPN and reload the page, the following steps should occur:

1. The Chrome browser makes a request to the proxy.
2. The proxy sends a response with a 407 code.
3. Chrome should call chrome.webRequest.onAuthRequired and provide credentials to the proxy.

However, I don't see any browser interactions with the proxy server.

Is it possible to observe the interaction between Chrome and the proxy using Fiddler?

Hello everyone,

I am trying to use a certificate that I have in the Windows Certificate Store with Fiddler.

In fact I am running the Fiddler in the server that is using the certificate in IIS.

I load the certificate to avoid fiddler certificate with the following code in Customize rules:

var certName: String = new String("servername")
var oCert: X509Certificate2 = CertMaker.FindCert(certName)
var result = false
MessageBox.Show(oCert)
result = CertMaker.StoreCert("servername", oCert);
MessageBox.Show(result)

 

In 4 line I show the certificate and it is correct.

In line 6 I verify that the certificate is loaded (true).

But if I try to access with the browser, fiddler show it is capturing an decrypting but with fiddler certificate (DO_NOT_TRUST_FiddlerRoot)

Can you help me to use the correct certificate installed in windows store?

I am trying to follow something like:

The CertEnroll Certificate Generator (telerik.com)

I have colleagues using with pfx file:

CertMaker.StoreCert("example.com", "C:\\temp\\cert.pfx", "TopSecretPassword");

but I want to use the other method:

CertMaker.StoreCert("example.com", certMyCert);

 

Any idea?

 

Thanks in advanced.

 

How can I decode a MessagePack of a certain websocket  ?

I tried to convert the hex to base64 then use an online msgpack converter to json but it didn't work.

I'm using Fiddler Everywhere.

(Attached an image)

Thank you !

Hi I can monitor the traffic of other applications with the iphone phone fiddler certificate. But Instagram traffic can't be tracked. How can i view instagram traffic via fidds.