The SSG Autologoff feature enables service providers that use SSG to offer subscribers per-minute billing plans for services. SSG autologoff also prevents subscribers from being charged for periods of time in which they were not active.
SSG MAC address checking enables service providers that use SSG to prevent a malicious host from spoofing the IP address of a logged-on host and accessing the logged-on host's services. The MAC address-checking functionality allows service providers to prevent SSG host session reuse when a Dynamic Host Configuration Protocol (DHCP) server assigns the same IP address to a second host because the first host released its IP address (through either a lease-time expiration or an explicit DHCP release), but did not log off from SSG.
