DHCP over VPN

SonicOS/X allows you to configure a firewall to obtain an IP address lease from a DHCP server at the other end of a VPN tunnel. In some network deployments, you want 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.

The firewall at the remote and central sites are configured for VPN tunnels for initial DHCP traffic as well as subsequent IP traffic between the sites. The firewall at the remote site passes DHCP broadcast packets through its VPN tunnel. The firewall at the central site relays DHCP packets from the client on the remote network to the DHCP server on the central site.