The DFL-1100 contains a DHCP server; DHCP (Dynamic Host Configuration Protocol) is a protocol that lets network administrators to automatically assign IP numbers to computers on a network. The DFL-1100 DHCP Server helps to minimize the work necessary to administer a network, as there is no need for another server running DHCP Server software.

The DFL-1100 DHCP Server only implements a subset of the DHCP protocol necessary to serve a small network, these are:

• IP address
• Netmask
• Subnet
• Gateway address
• DNS Servers
• WINS Servers
• Domain name

The DFL-1100 DHCP Server assigns and manages IP addresses from specified address pools within the firewall to the DHCP clients.

Note: Leases are remembered over a re-configure or reboot of the firewall.

The DFL-1100 also includes a DHCP Relayer. A DHCP relayer is a form of gateway between a DHCP Server and its users. The relayer intercepts DHCP queries from the users and forwards them to a DHCP server while setting up dynamic routes based on leases. This enables the firewall to keep an accurate routing table based on active users and protects the DHCP server to some degree among other things.

Note: There can only be one DHCP Server or DHCP Relay configured per interface.

The DFL-1100 contains a DNS relayer that you can be configured to relay DNS queries from the internal LAN to the DNS servers used by the firewall itself.