DHCP and Dynamic DNS

When a DHCP server issues a lease, it can add corresponding DNS host records to the master DNS server, using the Dynamic DNS (DDNS) protocol (standardised and documented in RFC 2136).  This maps a client host name to the leased IP address.

In a DNSBOX deployment, masters can work with slaves or your existing DHCP servers to deliver DDNS. The benefits of doing this are:

• Traceability: By registering each DHCP client in the DNS database, you can see which hostnames and which IP addresses are in use
• Creation of reverse DNS records: Many network services, such as email or SSH, require that client IP addresses have a corresponding reverse DNS record (a PTR record). These can be created and deleted dynamically by the DHCP server as it issues and revokes leases
• Human-readable hostnames: It is usually more convenient to connect to a network device using its hostname, which is more memorable than its IP address. DNSBOX100 or your DHCP servers can be configured to dynamically add host (A) records to the DNSBOX master as DHCP leases are issued and released

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