Before testing URL blocking, require your users to set the Web client’s HTTP proxy
               to point to IWSVA.
            
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                  For a stand-alone proxy, set the Web client’s HTTP proxy to point to IWSVA (for example,
                     open Internet Explorer and click Tools > Internet Options > Connections > LAN Settings > Use a proxy server). 
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                  For an upstream proxy, set the Web client’s HTTP proxy to point to IWSVA (for example,
                     open Internet Explorer and click Tools > Internet Options > Connections > LAN Settings > Use a proxy server). Open the IWSVA console and click HTTP > Configuration > Proxy Scan in the navigation menu and enable the Dependent Mode. Type the proxy address and the port number. 
To Test URL Blocking:
            
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                  Open the IWSVA console and click HTTP > URL Access Control > Global URL Blocking in the navigation menu and select Enable URL blocking. 
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                  In the Match field, type the full Web address, URL keyword, or the exact-match string. 
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                  Click Block, and then click Save. 
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                  Open a Web browser and try to access the blocked Web site, URL containing the string,
                     or the exact-match string. 
See also: