Zyxel USG 1900 [385/438] Packet flow explore

Zyxel USG 1900 [385/438] Packet flow explore
ZyWALL / USG (ZLD) CLI Reference Guide 385
CHAPTER 59
Packet Flow Explore
This chapter covers how to use the packet flow explore feature.
59.1 Packet Flow Explore
Use this to get a clear picture on how the ZyWALL / USG 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 the related
problems.
59.2 Packet Flow Explore Commands
The following table lists the commands that you can use to have the ZyWALL / USG display routing
and SNAT related settings.
Table 231 Packet Flow Explore Commands
COMMAND DESCRIPTION
show route order Displays the order of routing related functions the ZyWALL / USG checks for
packets. Once a packet matches the criteria of a routing rule, the ZyWALL / USG
takes the corresponding action and does not perform any further flow checking.
show system snat order Displays the order of SNAT related functions the ZyWALL / USG checks for
packets. Once a packet matches the criteria of an SNAT rule, the ZyWALL / USG
uses the corresponding source IP address and does not perform any further flow
checking.
show system route policy-route Displays activated policy routes.
show system route nat-1-1 Displays activated 1-to-1 NAT rules.
show system route site-to-site-vpn Displays activated site-to-site VPN rules.
show system route dynamic-vpn Displays activated dynamic VPN rules.
show system route default-wan-
trunk
Displays the default WAN trunk settings.
show ip route static-dynamic Displays activated static-dynamic routes.
show system snat policy-route Displays activated policy routes which use SNAT.
show system snat nat-1-1 Displays activated NAT rules which use SNAT.
show system snat nat-loopback Displays activated activated NAT rules which use SNAT with NAT loopback
enabled.
show system snat default-snat Displays the default WAN trunk settings.

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