app . NET can only access web service with Fiddler on

Question

I have a client application developed in . NET, I am not able to call a WS through the URL that was passed by my provider. I did the test using SOAP UI and it worked perfectly, I received the answer without problems, but my App only works when I am monitoring the connection using FIDDLER. I have already checked the following point:

1. I have set up Fiddler not to work as a PROXY. My service . NET continues to work;

I’ve researched that Fiddler makes a copy of my machine’s PROXY settings, but I can’t understand why Fiddler works and without it it doesn’t work anymore. Note: last year this app already existed and worked perfectly, we had to stop it for a year and now when trying to resume I’m having this problem.

The error message I get is: The request failed with HTTP status 502: Proxy Error ( Forefront TMG denied the specified Uniform Resource Locator (URL). ).

PS: I didn’t put the source of the call because I don’t have it now, stay with another team but I can get it if you find it of utmost importance.

Answer 1

This my problem was that the application . NET was run by a user who did not have enough privileges to complete the request to the web service. When I used FIDDLER it was with my user, who had the permissions. When swapping the user running the application for a user with permissions the problem has been solved.

A good practice that I will adopt is to run FIDDLER with the same user that runs the problematic application.