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copied!<p>This breaks the <a href="https://developer.mozilla.org/en/Same_origin_policy_for_JavaScript" rel="nofollow noreferrer">Same origin policy</a>. You cannot use a different port, even when using the same domain.</p> <p>You can use JSONP as <a href="https://stackoverflow.com/questions/2099728/how-to-send-request-to-non-80-port-on-the-same-site-with-jquery/2099771#2099771">Doug</a> suggested.</p> <p>Or else, as another possible workaround, you could set up a very simple <a href="http://en.wikipedia.org/wiki/Reverse_proxy" rel="nofollow noreferrer">reverse proxy</a> (using <a href="http://httpd.apache.org/docs/2.0/mod/mod_proxy.html" rel="nofollow noreferrer">mod_proxy</a> if you are on Apache). This would allow you to use relative paths in your AJAX request, while the HTTP server would be acting as a proxy to any "remote" location. </p> <p>The fundamental configuration directive to set up a reverse proxy in <a href="http://httpd.apache.org/docs/2.0/mod/mod_proxy.html" rel="nofollow noreferrer">mod_proxy</a> is the ProxyPass. You would typically use it as follows:</p> <pre><code>ProxyPass /ajax/ http://www.localhost:8080/ </code></pre> <p>In this case, you would request <code>/ajax/test.xml</code> with jQuery, but in fact the server would serve this by acting as a proxy to <code>http://www.localhost:8080/test.xml</code> internally. </p> <p>If you are using IIS, you may want to use the <a href="http://www.codeplex.com/Wikipage?ProjectName=urlrewriter" rel="nofollow noreferrer">Managed Fusion URL Rewriter and Reverse Proxy</a> to set up a reverse proxy.</p>

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