ZyWALL USG 20-2000 User’s Guide
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C
H A P T E R
5
Managing Traffic
These sections cover controlling the traffic going through the ZyWALL.
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How to Configure Bandwidth Management on page 95
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How to Configure a Trunk for WAN Load Balancing
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How to Use Multiple Static Public WAN IP Addresses for LAN-to-WAN Traffic on page 104
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How to Use Device HA to Backup Your ZyWALL on page 105
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How to Configure DNS Inbound Load Balancing on page 110
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How to Allow Public Access to a Web Server on page 112
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How to Manage Voice Traffic on page 114
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How to Limit Web Surfing and MSN to Specific People on page 120
5.1 How to Configure Bandwidth Management
Bandwidth management is very useful when applications are competing for limited bandwidth.
Connection and Packet Directions
Bandwidth management looks at the connection’s direction from the interface it was initiated on to
the interface it goes out. The connection initiator sends outbound traffic and receives inbound
traffic. The ZyWALL controls each flow’s bandwidth as it goes out through an interface or VPN
tunnel. For example, a LAN1 to WAN connection is initiated from LAN1 and goes to the WAN.
Figure 36
LAN1
to WAN Connection and Packet Directions
• Outbound traffic goes from a LAN1 device to the WAN. The ZyWALL applies bandwidth
management before sending the packets out a WAN interface.
• Inbound traffic comes back from the WAN to the LAN1 device. The ZyWALL applies bandwidth
management before sending the traffic out a LAN1 interface.
You can set outbound and inbound guaranteed and maximum bandwidths for an application.
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