How to blacklist unwanted programs?

[Fabian]

I'm using fiddler to debug the http requests of a program that I'm currently writing. So I'm constantly closing and recompiling the program and get a different exe everytime. 
I tried the "Select process" feature, but it seems to get sticked to a specific PID, so I would have to select my program every time I run it again. 
The problem with that: My program does an http request right after it's started, so this isn't gonna work. 

So for now the best thing I can do is to set Fiddler to ignore browsers. But for some reason, some applications just send their traffic through Fiddler even though I haven't configured then to do so. 
For example Skype and TeamViewer do a lot of http requests in the background and while you download a game on Steam it gets really insane...

So how can blacklist Skype, TeamViewer and Steam? Or how can I simply disallow programs from using Fiddler without me allowing it?

Best regards,
Fabian W.

[Eric Lawrence]

You've asked two questions:

1> How do I make it so only my program uses Fiddler?
2> How do I hide traffic from other programs?

For #1, you configure Fiddler so that it's not the system proxy (e.g. untick File > Capture Traffic) and then you manually configure your application to use the proxy using any mechanism available. That mechanism will depend on what the application uses for networking; e.g. you can set the .Proxy property on HTTPWebRequest objects if using .NET, or set the command line arguments for Java applets, etc.

For #2, there are many ways to do this. The simplest would be to click Rules > Customize Rules and scroll to OnPeekAtRequestHeaders. Uncomment the block and add two lines inside it: 

   var sProc = ("" + oSession["x-ProcessInfo"]).ToLower();
   if (!sProc.StartsWith("mylowercaseappname")) oSession["ui-hide"] = "NotMyApp";

Regards,
Eric Lawrence
Telerik

 

 

[Fabian]

Thanks for the reply. It totally fixed my problem. :)