Overview
Session management is a common module, providing basic services for NAT, ASPF, and intrusion detection and protection to implement their session-based services. Session management can be applied for the follow purposes:
Fast match between packets and sessions.
Management of transport layer protocol states.
Identification of application layer protocols.
Session aging based on protocol states or application layer protocols.
Persistent sessions.
Special packet match for the application layer protocols requiring port negotiation.
ICMP/ICMPv6 error control packet resolution and session match based on the resolution results.