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SonicOS 5.8.1 Administrator Guide
CHAPTER 27
Chapter 27: Using IP Helper
Network > IP Helper
Many User Datagram Protocols (UDP) rely on broadcaset/multicast to find its respective server,
usually requiring their servers to be present on the same broadcast subnet.To support cases
where servers lie on different subnets than clients, a mechanism is needed to forward these
UDP broadcasts/multicasts to those subnets. This mechanism is referred to as UDP broadcast
forwarding. IP Helper helps broadcast/multicast packets to cross a firewall’s interface and be
forwarded to other interfaces based on policy. For more information on IP Helper, refer to the
IP Helper technote at:
http://www.sonicwall.com/us/support/2134_3424.html
IP Helper Settings
• Enable IP Helper - Enables IP Helper features.
• Enable DHCP Support - Enables DHCP forwarding from the SonicWALL security
appliance to your central DHCP server. If the DHCP server has been enabled, the message
“DHCP Server has been enabled. To edit this setting, click here.” is displayed. Clicking
the link displays the Network > DHCP Server page.