four 10/100 ethernet lan ports provide wired lan connectivity; up to 253 users can share the same cable or dsl connection stateful packet inspection firewall automatically detects and blocks denial of-service attacks and other common intrusions support of vpn termination/initiation and passthrough allows secure connection to central office and/or secure access from remote workers network and port address translation (nat and pat) conserve expensive public ip addresses and assure privacy ip functions such as pptp/pppoe (point-to-point tunneling protocol/point to-point protocol over ethernet), nat (network address translation) dynamic dns, and dhcp (dynamic host configuration protocol) enhance addressing privacy and economy virtual server capability enables incoming access to specified servers handling ftp, web, e-mail and other traffic supports dsl modems requiring pptp on wan ports automatically supports ftp and microsoft netmeeting; pull-down menu support other popular applications browser-based user interface, preset defaults, device discovery, and setup wizards simplify installation, configuration, and administration