How to use Fiddler to monitor WCF service

You need to add this in your web.config <system.net> <defaultProxy> <proxy bypassonlocal=”False” usesystemdefault=”True” proxyaddress=”http://127.0.0.1:8888″ /> </defaultProxy> </system.net> then Start Fiddler on the WEBSERVER machine. Click Tools | Fiddler Options => Connections => adjust the port as 8888.(allow remote if you need that) Ok, then from file menu, capture the traffic. That’s all, but don’t forget … Read more

How do I get Fiddler to stop ignoring traffic to localhost?

To get Fiddler to capture traffic when you are debugging on local host, after you hit F5 to begin degugging change the address so that localhost has a “.” after it. For instance, you start debugging and the you have the following URL in the Address bar: http://localhost:49573/Default.aspx Change it to: http://localhost.:49573/Default.aspx Hit enter and … Read more

Get HTTP requests and responses made using HttpWebRequest/HttpWebResponse to show in Fiddler

The Fiddler FAQ gives the answer to this. You essentially route your HTTP traffic through Fiddler (i.e. Use Fiddler as a proxy). Here’s some links that will help: Fiddler Web Debugging – Configuring Clients Which in turn links to here: Take the Burden Off Users with Automatic Configuration in .NET You can achieve this via … Read more

how to Capture https with fiddler, in java

Create a keystore containing the Fiddler certificate. Use this keystore as the truststore for the JVM along with the proxy settings. Here’s how to do that: Export Fiddler’s root certificate Tools -> Fiddler Options… -> HTTPS -> Export Root Certificate to Desktop Create a keystore with this certificate Open command line as administrator (keytool doesn’t … Read more

ASP.NET MVC 4 Web API Authentication with Membership Provider

You could use basic authentication with SSL. On the server side we could write a custom delegating handler which will verify the credentials by querying the memebership provider that we registered, and if valid, retrieve the roles and set the current principal: public class BasicAuthenticationMessageHandler : DelegatingHandler { protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken) … Read more

What is point of SSL if fiddler 2 can decrypt all calls over HTTPS?

This is covered here: http://www.fiddlerbook.com/fiddler/help/httpsdecryption.asp Fiddler2 relies on a “man-in-the-middle” approach to HTTPS interception. To your web browser, Fiddler2 claims to be the secure web server, and to the web server, Fiddler2 mimics the web browser. In order to pretend to be the web server, Fiddler2 dynamically generates a HTTPS certificate. Essentially, you manually trust … Read more

Why does my C# gzip produce a larger file than Fiddler or PHP?

Preface: .NET users should not use the Microsoft-provided GZipStream or DeflateStream classes under any circumstances, unless Microsoft replaces them completely with something that works. Use the DotNetZip library instead. Update to Preface: The .NET Framework 4.5 and later have fixed the compression problem, and GZipStream and DeflateStream use zlib in those versions. I do not … Read more

Some androids apps won’t connect through fiddler

On modern Android devices using apps developed for target API Level 24 (Android 7) or higher sniffing traffic is not that simple anymore. The target API level of an app is defined it’s AndroidManifest.xml file in the entry <uses-sdk android:targetSdkVersion=”??”/>. The main problem is that if you install the Fiddler root CA certificate in Android … Read more