Installing and deploying the protector/content/support/library/data/v78/install/install_dss.pdf#page=43
        <h2>Data Security Installation Guide v7.8.x</h2>
        <h3>The protector</h3>
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        <p>
        The protector is an essential component of Websense Data Security, providing monitoring and blocking capabilities, preventing data loss and leaks of sensitive information. Using PreciseID technology, the protector can be configured to accurately monitor sensitive information-in-transit on any port. </p>
        <h3>When to use the protector</h3>
        The protector works in tandem with the Data Security server. The Data Security server provides advanced analysis capabilities, while the protector sits on the network, intercepts traffic and can either monitor or block the traffic, as needed. The protector supports analysis of SMTP, HTTP, FTP, plain text, IM traffic (e.g., Yahoo, MSN, chat, and file transfer). The protector is also an integration point for third-party solutions that support ICAP.
        <p>The protector fits into your existing network with minimum configuration and necessitates no network infrastructure changes. </p>
        <p>If you want to monitor SMTP traffic, the protector is your best choice. You configure a span port to be connected to the protector. This span contains your SMTP traffic. </p>
        <p>If you want email blocking capabilities, you can use either the protector’s explicit MTA mode or the SMTP agent (see below). </p>
        <p>Click <b>View Complete Document</b> for more. </p>