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SONICWALL SONICOS ENHANCED 2.5 ADMINISTRATOR’S GUIDE
113
Network > IP Helper
C
HAPTER
18
Chapter 18: Using IP Helper
Network > IP Helper
The IP Helper allows the SonicWALL security appliance to forward DHCP requests originating from
the interfaces on a SonicWALL security appliance to a centralized DHCP server on the behalf of the
requesting client. IP Helper is used extensively in routed VLAN environments where a DHCP server is
not available for each interface, or where the layer 3 routing mechanism is not capable of acting as a
DHCP server itself. The IP Helper also allows NetBIOS broadcasts to be forwarded with DHCP client
requests.
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.
• Enable NetBIOS Support - enables NetBIOS broadcast forwarding with the DHCP requests.
NetBIOS is required to allow Windows operating systems to browse for resources on a network.
S
Alert: The SonicWALL DHCP Server feature must be disabled before you can enable DHCP Support.