Terminology In The Zywall; Packet Flow - ZyXEL Communications ZyWALL USG 50 User Manual

6.3 Terminology in the ZyWALL

This section highlights some terminology or organization for ZLD-based ZyWALLs.
Table 15 ZLD ZyWALL Terminology
FEATURE / TERM
IP alias
Gateway policy
Network policy (IPSec SA)
Source NAT (SNAT)
Trigger port, port triggering
Address mapping
Address mapping (VPN)
Interface bandwidth management
(outbound)
OSI level-7 bandwidth
management
General bandwidth management

6.4 Packet Flow

Here is the order in which the ZyWALL applies its features and checks.
Traffic in > Defragmentation > Destination NAT > Routing > Stateful Firewall >
ADP > Application Classification > IDP > Anti-virus > Application Patrol > Content
ZyWALL USG 50 User's Guide
Chapter 6 Configuration Basics
ZLD ZYWALL FEATURE / TERM
Virtual interface
VPN gateway
VPN connection
Policy route
Policy route
Policy route
IPSec VPN
Interface
Application patrol
Policy route
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