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SONICWALL SONICOS STANDARD 3.0 ADMINISTRATOR’S GUIDE
233
VPN > DHCP over VPN
C
HAPTER
38
Chapter 38: Configuring DHCP Over VPN
VPN > DHCP over VPN
The VPN > DHCP over VPN page allows a Host (DHCP Client) behind a SonicWALL obtain an IP
address lease from a DHCP server at the other end of a VPN tunnel. In some network deployments, it
is desirable to have all VPN networks on one logical IP subnet, and create the appearance of all VPN
networks residing in one IP subnet address space. This facilitates IP address administration for the
networks using VPN tunnels.
DHCP Relay Mode
The SonicWALL appliance at the remote and central site are configured for VPN tunnels for initial
DHCP traffic as well as subsequent IP traffic between the sites. The SonicWALL at the remote site
(Remote Gateway) passes DHCP broadcast packets through its VPN tunnel. The SonicWALL at the
central site (Central Gateway) relays DHCP packets from the client on the remote network to the
DHCP server on the central site.