Chapter 32 Application Patrol
ZyWALL USG 100/200 Series User’s Guide
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• The outbound traffic flows from the connection initiator to the connection
responder.
• The inbound traffic flows from the connection responder to the connection
initiator.
For example, a LAN1 to WAN connection is initiated from LAN1 and goes to the
WAN.
• Outbound traffic goes from a LAN1 zone device to a WAN zone device.
Bandwidth management is applied before sending the packets out a WAN zone
interface on the ZyWALL.
• Inbound traffic comes back from the WAN zone device to the LAN1 zone device.
Bandwidth management is applied before sending the traffic out a LAN1 zone
interface.
Figure 407 LAN1 to WAN Connection and Packet Directions
Outbound and Inbound Bandwidth Limits
You can limit an application’s outbound or inbound bandwidth. This limit keeps the
traffic from using up too much of the out-going interface’s bandwidth. This way
you can make sure there is bandwidth for other applications. When you apply a
bandwidth limit to outbound or inbound traffic, each member of the out-going
zone can send up to the limit. Take a LAN1 to WAN policy for example.
• Outbound traffic is limited to 200 kbps. The connection initiator is on the LAN1
so outbound means the traffic traveling from the LAN1 to the WAN. Each of the
WAN zone’s two interfaces can send the limit of 200 kbps of traffic.
Connection
BWM
BWM
Outbound
Inbound
LAN1
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