Capture WCF Service with localhost Filter

Environment

Description

The .NET Framework bypasses all proxies on localhost. This means WCF Services will not be captured. In order to capture WCF Services using Fiddler. Disable the bypassonlocal and point the application to the Fiddler Classic Proxy address.

Solution

In the web.config or app.config add the following proxy settings.

<system.net>
  <defaultProxy>
    <proxy  bypassonlocal="False" usesystemdefault="True" proxyaddress="http://127.0.0.1:8888" />
  </defaultProxy>
</system.net>

See Also

• Capture .NET Applications with Fiddler
• Capturing Traffic from .NET Services with Fiddler