I'm connecting to a site using https which use an invalid certificate, and when I connect to it, I receive a browser warning saying the certificate is invalid, but after selecting the option to proceed I'm able to browse it correlty. Now I want to inspect the traffic to this site using Fiddle, but I'm receiving the following error:

 

fiddler.network.https> HTTPS handshake to 192.168.xx.xx (for #52) failed. System.Security.Authentication.AuthenticationException The remote certificate is invalid according to the validation procedure.

 

How to make Fiddler to trus this remote certificate?

Its like a flash game where you do something, and refresh and do it again and refresh over and over again. Is there way to just do it once, and use fiddler to make it look like we have done it hundreds of times? 

Hello,

i've got network error when trying to sign in. See attached file

My Fiddler Everywhere account is created and activated. See attached file

i'm using Fiddler 1.1.1 (Mac Os), no proxy (internet at home).

any clue please?

hello ,

iam using fiddler 4 i have made a proxy using my laptop windows 10 but i can only connect devices which connected to  my wifi 

i just want to know how to connect remotely to ppl without need to connect there devices to my wifi .

thx

I have a dotnet core project (web api) running on port 5000 locally. I then have 2 clients (postman and a android emulator running flutter) that are running, also locally. I have Fiddler running and it's capturing some traffic (teams, firefox, spotify, etc). But when I make a request in postman or in the flutter app on the android emulator, it is not capturing anything.

What do I need to check/do to make this work?

Hi,

I am trying to capture iOS traffic (iOS 13).

I've followed this guide: https://www.telerik.com/blogs/how-to-capture-ios-traffic-with-fiddler but once I configure the wifi proxy of the iPhone I'm no longer able to navigate in any browser and so I'm not able to reach http://ipv4.fiddler:8888 to download the certificate.
What should I do?

I've been trying to switch and use Fiddler Everywhere after using the original Fiddler for years. I like the UI, but it seems to have lots of functionality missing. The most basic of which is the ability to filter across multiple hosts, or am I missing something? I can filter on 1 host header via the filter, but adding more results in nothing being displayed as they seem to AND together. The system I'm working on has microservices, so I want to be able to filter out all the noise and just see requests from all my services so I can trace a request through the services. Is this possible, or do I need to stick to the old tried and trusted Fiddler?

I'm using Fiddler to capture traffic from Android phones. I have followed the steps in https://www.telerik.com/blogs/how-to-capture-android-traffic-with-fiddler and I can capture https traffic just fine on a physical device. However when using an Android emulator I am unable to capture any traffic.

I'm using an Android 5.1 system image to be sure that the Android 7 change with ignoring user-installed root certificates does not affect me. When trying to load an https page like https://example.com in the default browser on the emulator the initial CONNECT request gets closed immediately according to fiddler and after a very long time the browser times out and shows an net::ERR_CONNECTION_REFUSED error.

See the attached screenshot for what this looks like in Fiddler.

Here are some setups that I've tried:
* Fiddler 5.0.20202.18177 on two different Windows 10 computers
* Using the emulator bundled with Android Studio on the same computer as I'm running Fiddler
* Using the emulator bundled with Android Studio on a Linux computer on the same network as I'm running Fiddler
* Using the Genymotion emulator, on the same computer as I'm running Fiddler

In all these cases http traffic is captured fine but https traffic can not be captured.

In addition to this I've also tried swapping out Fiddler with both Burp suite and mitmproxy and when doing this I can capture https traffic from emulators just fine. It seems like there is some problem with Fiddler and Android emulators rather than my setup.

Please let me know if there there is any other information I could provide to help resolve this issue. I really like Fiddler and would hate it if I had to use Burp suite or similar when working with emulators.

Hello,

There is an old library which I do not have the source.It is a client library for an API endpoint. 

I need to log which requests are made from which function. Since library is used in a multithreaded environment, and I cannot alter the requests and responses, I'm stuck.

One way would be creating a series of proxies and assigning them to client before each function call, but it seems very inefficient.

 

Any thoughts?

    We have a corporate proxy in place using Websense, and with it enabled there is no traffic capture in fiddler, nothing at all

It just has the one line where it checks for updates and nothing else, 

Any ideas?

I could get the proxy disabled on my system but that isn't the standard use case on the network so wont help in troubleshooting the original issue

Anyone had similar issues? Is there a way to whitlelist on the proxy to enable fiddler traffic to be captured?

Thanks