RADIUS and LDAP sign-on services, as well as data access ports and a variety of protocols and services such as peer-to-peer (P2P), are turned off by default. The feature looks at the packets that pass through the firewall, making real-time determinations about permitting HTTP requests and checking the content, such as URLs and other metadata, for violations of content-filtering rules. The protocol inspector examines HTTP, FTP, POP3, SMTP, and other common protocols. The policy module focuses on control of the networking elements related to the end user, such as HTML objects and bandwidth, but you can also create policies for ports. The firewall's user-access and traffic policies, which manage port blocking, are simple to configure but offer powerful, granular control that lets administrators do fine-tuning to meet stringent network restrictions.
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