i using TMG (threat management gateway) firewall at my web server. when i try to use Curl from outside, this firewall was blocked the connection. what rule/setting that i need to create at TMG to allow it.

the error state as below :

Refresh page: Search for the page again by clicking the Refresh button. The timeout may have occurred due to Internet congestion. Check spelling: Check that you typed the Web page address correctly. The address may have been mistyped. Access from a link: If there is a link to the page you are looking for, try accessing the page from that link.

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  <P id=L_defaultr_11>Technical Information (for support personnel)</P>
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    <LI id=L_defaultr_12>Error Code: 403 Forbidden. The server denied the specified Uniform Resource Locator (URL). Contact the server administrator. (12202)