FreeRADIUS DHCP server
This guide describes how FreeRADIUS can be used in place of ISC DHCP or ISC Kea to provide a significantly more performant and, above all, more flexible DHCP server.
This guide provides a suggested configuration that should be somewhat familiar to anyone who has previously implemented DHCP using the most frequently used features of other DHCP server software.
The modular design of FreeRADIUS means that there is no one "right" way to implement the DHCP service. FreeRADIUS allows you to put together a "mix and match" approach.
For example you can manage the leases in an SQL database. You might then hard code certain DHCP reply parameters within configuration and then look up additional parameters using a datastore such as:
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a local file such as a structured text file or an SQLite database
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an organisational LDAP directory
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an SQL or "no SQL" database
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a remote endpoint such as a RESTful HTTP API
The policy language and modular configuration of FreeRADIUS is sufficiently powerful and that almost any aspect of the server’s behaviour can be customised to implement even the most sophisticated DHCP configurations.