Session Settings and Timeouts
Understand the session settings and timeouts that affect the Transport Layer.
Where Can I Use This? | What Do I Need? |
- NGFW (Managed by PAN-OS or Panorama)
| |
A network session is an exchange of messages that occurs between two or more
communication devices, lasting for some period of time. A session is established and is
torn down when the session ends. Different types of sessions occur at three layers of
the OSI model: the Transport layer, the Session layer, and the Application layer.
The Transport Layer operates at Layer 4 of the OSI model, providing reliable or
unreliable, end-to-end delivery and flow control of data. Internet protocols that
implement sessions at the Transport layer include the Transmission Control Protocol
(TCP) and User Datagram Protocol (UDP).
This section describes the global settings that affect TCP, UDP, and ICMPv6 sessions, in addition
to IPv6, NAT64, NAT oversubscription, jumbo frame size, MTU, accelerated aging, and
Captive Portal authentication. There is also a setting (Rematch Sessions) that enables
you to apply newly configured security policy rules to sessions that are already in
progress.