Web Service access + internal traffic + 407 Proxy Authentication Required

Fri, 02 Mar 2012 14:35:11 +0000

This had me stumped for a while. I was developing a SharePoint-based client to consume a simple web service. I started by writing a console app version of the code before deploying to SharePoint. Fairly straight-forward - added a web reference to my VS2010 project, and used

MyWebService srv = new MyWebService();
srv.DoSomething();

Early on in the project, I didn’t give much to the fact that when calling the method on the web service, I was given a 407 Proxy Authentication Error. I just setup a simple proxy for it:

Proxy Authentication Required on Matt Thornton

Web Service access + internal traffic + 407 Proxy Authentication Required