Httplistener not working on port 80?

Question

Setup: Windows 7, IIS installed and running.

The following code snippet:

HttpListener listener = new HttpListener();
listener.Prefixes.Add("http://server.com:8080/path");
listener.Start();

Works like a spell - any request made against the server is received in my code.

However, when I make the following change (moving to port 80), http.sys / IIS (not sure what) returns HTTP 503 errors:

listener.Prefixes.Add("http://server.com:80/path");

I tried setting the URLACL, starting this process as admin, etc., but nothing changed this behavior.

Edit: clear it - there is no real network in this mess. All this is done locally on the same machine for testing purposes (both for the server and for the client).

Any ideas?

Answer 1

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Answer 2

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