My Fiddler crashed the last Friday, and after that, something in the background always auto-enable proxy settings in Internet Options even though the Fiddler isn't running, as a result, I couldn't open any web pages and have to manually disable the proxy, but the proxy would be re-enabled again in few minutes and I have to repeat that again and again, any advice to identify and fix that? Thank you.

Hello, i newly install fiddler for log for one week the http trafic. So i configure the auto-save but and put fiddler on my startup folder , but when the software start after a reboot the auto-save are not configure and i need to comeback on the software for configure the auto-save

 

My questions is : Can i script or if there is a option for configure auto-save at the boot of my computer.

 

Thanks for help !

Hello,
I connect fiddler with IOS device. HTTPS is turned on, the certificate is installed couple times.
The connection is fine. I can see the tunnel to...:443. I can also see https/404... but nothing else.
When I started the App, it says unable to connect to the server.
Fiddler only has tunnel to...443.  https://0123movie.net/
But for some reason, I was able to capture the traffic and log-in one time. well, only the once...
I am sure there is nothing different that time. I think Fiddler is acting wired...
Have any suggestion? thank you.

Hey, there! So Ive been using fidler for a while so i decided to try to sniff the requests out from a mobile app. And for some reason it didn't work. I have the certificate and everything set up. So i googled it and i saw one guy who converted the apk of a random apk (Im on android) and put a network_secutity_config.xml file in there that basically tells the app to trust the trusted certificates. It didn't work this way either so im just lost at this point. Do you know anything about this?

Basically the app just doesn't send the requests when sniffing with fiddler. They appear but in some weird ciphered format and it doesn't even give me a response.

I trying to test a simple demo application written in Visual Studio C++. However nothing is logged in Fiddler 4 when the program runs.

I complied the code from here on my Win10 m/c using VS 2017 community:

https://www.codeproject.com/Articles/66625/A-Fully-Featured-Windows-HTTP-Wrapper-in-C

I am running this simple function which does a 'GET'

void SimpleGetTest(void)
{
    wprintf(L"SimpleGetTest\r\n");

    // Set URL.
    WinHttpClient client(L"http://www.codeproject.com/");

    // Send http request, a GET request by default.
    client.SendHttpRequest();

    // The response header.
    wstring httpResponseHeader = client.GetResponseHeader();

    // The response content.
    wstring httpResponseContent = client.GetResponseContent();

    wprintf(L"<%ws>\r\n", httpResponseContent.c_str());
}

 

When I run the program the console output shows HTML response content just fine, Fiddler sees nothing.

 

If I stick "http://www.codeproject.com/" into my Firefox Fiddler does see the traffic ok.

 

I am very new to Fiddler and I downloaded it a few days ago and I am using it with the default settings. Is there some setting I need to change so it sees the traffic from my code?

 

As a matter of interest when I start VS Studio I can see traffic in Fiddler for the connection to Microsoft VS site.

 

 

I have a capture made with Wireshark of HTTP traffic going through ports 81 and 105. When importing the PCap, Fiddler shows me the transactions going on port 81 but nothing from port 105. I'm able to see them in WS after telling it that port 105 contains HTTP traffic.

Is there something similar for Fiddler?

Hi All,

Recently, I discovered Fiddler is able to show Secured Direct Download Link for Web Installers. Unfortunately, Fiddler failed to capture any web traffic for this application.

Is there a way around this issue? Thanks.

Hi I got issues after my last reboot of the computer (after an update) Fiddler does no longer capture any data. 

I started the Troubleshoot in the help menu and got the comment "Hidden due to FTS>OnlyProcessID" for everything. 

What do I need to do to fix this issue?

 

I have tried to reinstall Fiddler so I do have the latest version: v5.0.20194.41348 for .NET 4.6.1, Built: den 3 oktober 2019

 

Thank you in advance!

I'm debugging a .Net Core project using VS For Mac and Safari. Fiddler does not capture traffic to "localhost", only to external addresses. How can I fix this?

Hi All,

I am using Fiddler to Switch the Hostnames with IP address so that I can access my personal email from my work pc. It used to work until recently but from last week I am unable to open Gmail or outlook. Before the host is switched by Fiddler our office proxy system detecting the host name and blocking it. How can this be solved?

Thanks in Advance.