SonicWALL 2.5 User Manual
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VPN > DHCP over VPN
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Chapter 31:
Configuring DHCP Over VPN
VPN > DHCP over VPN
The VPN > DHCP over VPN page allows you to configure a Host (DHCP Client) behind a SonicWALL
security appliance to 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.
security appliance to 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 security 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 security
appliance at the remote site (Remote Gateway) passes DHCP broadcast packets through its VPN
tunnel. The SonicWALL security appliance at the central site (Central Gateway) relays DHCP
packets from the client on the remote network to the DHCP server on the central site.
initial DHCP traffic as well as subsequent IP traffic between the sites. The SonicWALL security
appliance at the remote site (Remote Gateway) passes DHCP broadcast packets through its VPN
tunnel. The SonicWALL security appliance at the central site (Central Gateway) relays DHCP
packets from the client on the remote network to the DHCP server on the central site.
Configuring the Central Gateway for DHCP Over VPN
To configure DHCP over VPN for the Central Gateway, use the following steps:
1 Select VPN>DHCP over VPN.