SonicWALL Internet Security Appliances User Manual

Page 170

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DHCP Server Page 171

LAN Device Configuration

7. To configure Static Devices on the LAN, enter the IP address of the device in the IP Address field

and then enter the Ethernet Address of the device in the Ethernet Address field. An example of
a static device is a printer as it cannot obtain an IP lease dynamically. If you do not have Block
traffic through tunnel when IP spoof detected enabled, it is not necessary to enter the Ethernet
address of a device.

8. You must exclude the Static IP addresses from the pool of available IP addresses on the DHCP

server so that the DHCP server does not assign these addresses to DHCP clients. You should
also exclude the IP address used as the Relay IP Address. It is recommended to reserve a block
of IP address to use as Relay IP addresses.

9. Select LAN Devices not allowed to obtain IP through SA if there are devices on the LAN that you

do not want to obtain IP addresses through the VPN tunnel, such as children’s computers. You
must know the Ethernet address of the device to configure this setting. The Ethernet address
of a device can be determined by typing ipconfig/all into a Command Prompt window.

Alert You must configure the local DHCP server on the remote SonicWALL to assign IP leases to
these computers.

Alert If a remote site has trouble connecting to a central gateway and obtaining a lease, verify that
Deterministic Network Enhancer (DNE) is not enabled on the remote computer.

Tip If a static LAN IP address is outside of the DHCP scope, routing is possible to this IP, i.e. two
LANs.

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