I would like to see what is going through my Android device at all, not for a certain app. Therefore, I saw this tutorial and did everything step by step.

• Fiddler Classic is installed my laptop computer, which is NOT, but is connected to my access point.
• I have an Android tablet device which is NOT, but is connected to my access point.

As you can see on the attached screenshot, the packet sizes were 0 and it says "Tunnel to" ?!

I've read, the reason is because there would be no trust to Fiddler? But I already installed the FiddlerRootCa.cer already?!?!?!

The mobile device is a Huawei Mediapad M5

The laptop pc has running Windows 10 on it and I use Fiddler Classic

EDIT: I've setup an Android emualator. When I enter for instance amazon.de I am asked to continue to amazon.de as in screenshot*.png. Then Fiddler capture looks like in amazon.png .. Most of traffic still tunneled and size 0.  

What do I need to do when I want to capture traffic from an app and not a browser? Screenshot_1620659395.png shows Google Assistant, which is not communicating as the chrome browser.. 

(Side question: I also have a Android TV device onwhich I have root access. How can I install the Fiddler certificate on that?)

The steps that were followed to initialize the fiddler tool are mentioned below.

Steps (Commands used in linux):

1. sudo apt-get install mono-complete libcanberra-gtk-module
2. mkdir $HOME/fiddler-linux
3. cd $HOME/fiddler-linux
4. wget http://www.telerik.com/docs/default-source/fiddler/fiddler-linux.zip
5. unzip -x fiddler-linux.zip
6. mono --debug Fiddler.exe

 

 

System Environment:

Can any one of you please suggest to me how to resolve this error?

Hello Fiddler team,
Can you please tell me on how to achieve this. I am using classic fiddler.
I will send requests continuously. If response of the request is 'true', there is no need to worry. Till here no worries. But I want to break on new requests when response is false. How can this break be achieved?

.

I want to use AutoResponder to mock a response from my server. The response in question is JSON object and I need to tweak its properties slightly. The thing is I cannot seem to do that via the Edit Response menu in Fiddler. Here's a screenshot: http://screencast.com/t/1f7iNWTF1NX9

There's something called "Send to TextWizard" but I don't know what that's about.

Thanks

How to cancel the highlighted?
I'm afraid the software of progress telerik fiddler web debugger does not have this capability.

https://docs.telerik.com/fiddler/knowledge-base/fiddlerscript/modifyrequestorresponse?_ga=2.226810973.1912327690.1619085606-390831375.1615941114

 

I reviewed the content on this link. I added the nuget library. Why can't I use these codes? When using it with C #, I get an error as I mentioned in the appendix. "'oSession' does not exist in the current context" What is the cause of this error? I cannot use any code related to Fiddler. What causes the oSession error? I want to work on FiddlerCore, but I couldn't find a solution for this error.

I tried to redirect all traffic thru Fiddler by using redsocks and iptables. Plaintext HTTP seems to work fine, however HTTPS doesn't seem to work properly.

Initially I didn't want to use redsocks at all - however it seemed that Fiddler cannot work in the way similar to sniproxy: using iptables -j DNAT alone doesn't work at all.

Then, although redsocks supports http CONNECT proxy mode, Fiddler no longer shows domain names in intercepted CONNECT entries - IP addresses are shown instead. Fiddler also throws out certificate errors, even if I check the "ignore certificate errors" checkbox, the intercepted application (which already trusts FiddlerRoot certificate) still refuses to connect. I think this should be related to SNI.

I think if Fiddler could work in the way similar to sniproxy, this problem would no longer exist, probably.

Hello,

Is it possible to capture localhost (client and server) websockets communication?In my case, in the client side I am using javascript code to connect to the websocket server, that it is started using java language.

In fiddler I do not see anything...

 

Regards,

Ed

Hello,

Is there any way to decompress post data in Fiddler, sent from application? Post request to server contain headers like this:
Content-type: application/x-compressed-json
Content-length: 3xx

Sent JSON data is unreadable. Any ideas are welcome!