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The base install of pfSense® software includes services which add fundamental functionality and flexibility to the firewall. The topics in this chapter discuss services in the base installation that the firewall provides for other hosts on the network. These services include allocating IPv4 and IPv6 addresses via DHCP, DNS resolution and Dynamic DNS, SNMP, UPnP and more. Additional services can also be added with packages, which will be covered later in the book.