Alcatel-Lucent 7750 SR-OS Configuration Manual page 421

Filter Policies
Note that the subscriber identification string is available only when used with subscriber
management. Refer to the subscriber management section of the SROS Triple Play Guide and the
SR OS Router Configuration Guide.
Since most web sites are accessed using the domain name the router allows either DNS queries or
responds to DNS with the portal's IP address.
7750 SR OS Router Configuration Guide Page 421