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 Fidder will start picking up your traffic.

Fiddler's website addresses this question directly.

There are several suggested workarounds, but the most straightforward is simply to use the machine name rather than "localhost" or "127.0.0.1":

http://machinename/mytestpage.aspx

The correct answer is that it's not that Fiddler ignores traffic targeted at Localhost, but rather that most applications are hardcoded to bypass proxies (of which Fiddler is one) for requests targeted to localhost.

Hence, the various workarounds available: http://fiddler2.com/documentation/Configure-Fiddler/Tasks/MonitorLocalTraffic

Internet Explorer has a new feature since IE9 RC: adding <-loopback> to the proxy bypass list causes WinInet (the network library used by IE) to send requests destined for localhost and 127.0.0.1 through the defined proxy.

Here's the original announcement by @EricLaw: http://blogs.msdn.com/b/fiddler/archive/2011/02/10/fiddler-is-better-with-internet-explorer-9.aspx

Don't use localhost in the url!

• http://localhost:4200/myTestProject

Use like this:

• http://MyMachineName:4200/myTestProject
• http://ipv4.fiddler:4200/myTestProject

=>=> Click here for further information <=<=

make sure Monitor all connections is ticked. it does not work for me maybe port is diffren i need yo see httprequest to my site from gmail my site is on win xp and iis5(my own machine)

Windows XP:

Be sure to set to click the settings button for each of the items in the "Dial-up and Virtual Private Network settings" listbox in the "Connections" tab of the "Internet Options" control panel applet.

I noticed that Fiddler would stop using the "LAN settings" configuration once I connected to my VPN. Even if the traffic wasn't going through the VPN.

• Type ipconfig at the commmand prompt.
• It will give you your IPv4 Address
• Replace localhost with your IPv4 Address in the Url when hitting the service.

The traffic will show up in Fiddler under your computer's IP address.

Unfortunately none of the suggestions were helpful

Only complete exclusion of localhost from monitoring with following setting:

Open View Menu
  > Preferences
    > Connections
      > Bypass Fiddler for URLs that start with:
        > localhost;127.0.0.1