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Chapter 6 Configuration Basics
ZyWALL USG 50 User’s Guide
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6.3 Terminology in the ZyWALL
This section highlights some terminology or organization for ZLD-based ZyWALLs.
6.4 Packet Flow
Here is the order in which the ZyWALL applies its features and checks.
Traffic in > Defragmentation > ALG > Destination NAT > Routing > Stateful
Firewall > ADP > Application Classification > IDP > Anti-virus > Application Patrol
> Content Filter > Anti-Spam > SNAT > Bandwidth Management > Traffic Out.
Table 15 ZLD ZyWALL Terminology
FEATURE / TERM ZLD ZYWALL FEATURE / TERM
IP alias Virtual interface
Gateway policy VPN gateway
Network policy (IPSec SA) VPN connection
Source NAT (SNAT) Policy route
Trigger port, port triggering Policy route
Address mapping Policy route
Address mapping (VPN) IPSec VPN
Interface bandwidth management
(outbound)
Interface
OSI level-7 bandwidth
management
Application patrol
General bandwidth management Policy route