C# – Is it possible to do ClickOnce Deployment with Apache

ClickOnce installation involves verifying that the server name matches the expected name. Thus localhost always gets translated under the covers to the computer name [not the username as you suggest in your question] (one of many confusing things ClickOnce does - one side effect of this is that if you want to set up 3 download servers, you need to do 3 separate publishes and/or script the publish like this) or like this. So this is not a surprise - it's always doing that under the covers.

The 407 error relates to proxy auth. This implies downloading is being diverted via a proxy such as Microsoft ISA Server. Have a look in your IE Internet Options Connections Proxy Settings and make sure its bypassing for local addresses [such as chrish].

The reason it's reporting success is that the upload likely uses an alternate mechanism than the verification does and isn't being routed via / blocked by the proxy. (The underlying problem is that the .NET framework does not by default pass proxy credentials and you'd need to either apply a config entry for devenv or whatever does the publish or have the build process call a test step with extra code that does send the proxy credentials](http://blogs.msdn.com/jpsanders/archive/2009/03/24/httpwebrequest-webexcepton-the-remote-server-returned-an-error-407-proxy-authentication-required.aspx). See also How should I set the default proxy to use default credentials?)

The 2^nd option is the one you want.

In your web.config, make sure these keys exist:

<configuration>
    <system.webServer>
        <validation validateIntegratedModeConfiguration="false"/>
    </system.webServer>
</configuration>