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Editorial Team
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Asked: 2026-05-17T00:24:46+00:00

I’m really posting this question so that others searching for the answer can find

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I’m really posting this question so that others searching for the answer can find it.

Scenario:
WCF Service: Has worked fine at some point but currently is returning 403 errors. The web.config looks fine as far as I can tell. This machine has set the web.config to disable transport and message security and is using BasicHTTPBinding.

When I call it with my client generated from the Service Reference in Visual Studio, I get a 403 error. The error indicates there is some problem with the authentication, but as far as I can tell there is no such problem.

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1 Answer

  1. Editorial Team

    To solve this problem, I used Fiddler to get the actual error code – in this case, a 403.1. This indicated that the executable for the service couldn’t be run.

    The actual problem ended up being that the ASP.NET version was set to 1.1, not 2.0+. So setting that to 2.0 resolved the 403 permission error.

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