IP packet filtering limits the services to individual users when they log on to a network.
Packet filtering can permit or deny access based on destination IP addresses or ports or both. Different policies are enforced by defining multiple sets of packet filter rules with each having their own unique PPP filter identifier. Packet filter rules can be assigned for a particular receiver connection profile or can be assigned by using a Group Policy that will apply the filter rules for that category of user. The packet filter rules themselves are not defined in PPP, but are defined under IP Packet Rules in iSeries™ Navigator.
For L2TP connections, VPN with IPSec filtering should be used to protect network traffic.