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 Chapter 6 Configuration Basics

ZyWALL USG 50 User’s Guide

This section highlights some terminology or organization for ZLD-based ZyWALLs.

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 

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