Chapter 48 Packet Flow Explore
ZyWALL USG Series User’s Guide
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HAPTER
48
Packet Flow Explore
48.1 Overview
Use this to get a clear picture on how the Zyxel Device determines where to forward a packet and how
to change the source IP address of the packet according to your current settings. This function provides
you a summary of all your routing and SNAT settings and helps troubleshoot any related problems.
48.1.1 What You Can Do in this Chapter
• Use the
Routing Status
screen (see
) to view the overall routing flow and
each routing function’s settings.
• Use the
SNAT Status
) to view the overall source IP address
conversion (SNAT) flow and each SNAT function’s settings.
48.2 The Routing Status Screen
The
Routing Status
screen allows you to view the current routing flow and quickly link to specific routing
settings. Click a function box in the
Routing Flow
section, the related routes (activated) will display in the
Routing Table
section. To access this screen, click
Maintenance
>
Packet Flow Explore
>
Routing Status
.
The order of the routing flow may vary depending on whether you:
• Select
use policy route to override direct route
in the
CONFIGURATION > Network > Routing > Policy
Route
screen.
• Use policy routes to control 1-1 NAT by using the
policy control-virtual-server-rules
activate
command.
• Select
use policy routes to control dynamic IPSec rules
in the
CONFIGURATION > VPN > IPSec VPN >
VPN Connection
screen.
Note: Once a packet matches the criteria of a routing rule, the Zyxel Device takes the
corresponding action and does not perform any further flow checking.
Summary of Contents for USG110
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