ZyXEL Vantage CNM User Guide - Page 191
Device Operation > Device Configuration > Security > Content Filter >
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Chapter 6 Device Security Settings Table 69 Device Operation > Device Configuration > Security > Content Filter > General (continued) LABEL DESCRIPTION Enable Content Filter for VPN traffic Select this check box to have the content filter apply to traffic that the device sends out through a VPN tunnel or receives through a VPN tunnel. The device applies the content filter to the traffic before encrypting it or after decrypting it. External Database Service General Setup Enable External Database Content Filtering Matched Web Pages Note: The device can apply content filtering on the traffic going to or from the device's VPN tunnels. It does not apply to other VPN traffic for which the device is not one of the gateways (VPN pass-through traffic). The external database content filtering service has the Vantage CNM check an external database to find to which category a requested web page belongs. Turn on external database content filtering to have the Vantage CNM block or forward access to web pages depending on the Vantage CNM's external database content filtering settings. Select Block to prevent users from accessing web pages that match the categories that you select below. When external database content filtering blocks access to a web page, it displays the denied access message that you configured in the CONTENT FILTER General screen along with the category of the blocked web page. Unrated Web Pages Select Log to record attempts to access prohibited web pages. Select Block to prevent users from accessing web pages that the external database content filtering has not categorized. When the external database content filtering blocks access to a web page, it displays the denied access message that you configured in the CONTENT FILTER General screen along with the category of the blocked web page. When Content Filter Server Is Unavailable Select Log to record attempts to access web pages that are not categorized. Select Block to block access to any requested web page if the external content filtering database is unavailable. The following are possible causes: There is no response from the external content filtering server within the time period specified in the Content Filter Server Unavailable Timeout field. The Vantage CNM is not able to resolve the domain name of the external content filtering database. There is an error response from the external content filtering database. This can be caused by an expired content filtering registration (External content filtering's license key is invalid"). Select Log to record attempts to access web pages that occur when the external content filtering database is unavailable. Vantage CNM User's Guide 191