- Add and change subnets and pools without restarting Kea.
- Store leases and host reservations in a structured database rather than a text file.
- Extend and customize Kea through a Hooks api.
- Kea has comprehensive Developer and Administrator documentation.
- ISC offers commercial 7 x 24 support for Kea, as well as consulting and contract development to assist in implementing Kea, including migration from ISC DHCP.
Kea runs on Linux, BSD, and MacOS, like ISC DHCP. The Kea distribution does not yet include a DHCP client or relay, but because both are standards-based, the ISC DHCP client works fine with the Kea DHCP server. Kea is under active development.
In 2017 we are adding a remote management capability. This work is generously sponsored by Mozilla, through a Mozilla Open Source award.
Kea Project wiki
Kea Developer Guide
Broad, standards-compliant support for both DHCPv4 and DHCPv6 protocols
- Direct address assignment or DHCPv6 prefix delegation
- Dynamic DNS for updating DNS records as leases are renewed or expired
- Dynamic IP addressing for most clients and static host reservations, for servers and printers
- Tracking of MAC addresses, even in DHCPv6
- Most DHCPv4 and v6 options, or easily add your own
Kea Hooks Integrate with Your Other Systems
- Using Hooks, it is possible to control the assignment of options and even addresses from your own provisioning system
- Hook points include: packet received, subnet selected, lease renewed, lease released, ready to respond (different hook points for DHCPv4 and DHCPv6)
- Hooks allow the developer to edit information such as the lease parameters (time to renew), the subnet, address or options to be delivered
- The Kea distribution includes a sample hooks application that can retrieve per-user information from an external file (such as options)
- We have a recorded presentation on writing a Hooks application, given by one of our software engineers.
- For an example of how this can be used, see the FaceBook Kea Application
- If this sounds like too much – ask us if we can do it for you!
We are building a library of commercially-licensed hooks applications to help support Kea development. These are included with any Kea support subscription, and are also available for separate, one-time purchase from this web site. These are distributed as a source package, but with an End User License Agreement that prohibits redistribution.
- Our Forensic Logging application works with Kea 1.1 and later versions and creates a separate log that may be useful for meeting law enforcement data retention requirements.
- The Flexible Identifier library is supported on Kea 1.2 and later and enables use of almost any available parameter as the identifier for host reservations.
- The Host Commands library, supported with Kea 1.2 and later, extends remote management to manage host reservations stored in a back end database.
Kea Premium Package Includes
Weighing your options
|Feature Support||Kea Server||ISC DHCP Server|
|DHCPv4 or DHCPv6 server|
|Delegate lease allocation to external database||—|
|Uninterrupted service – online reconfiguration||no restart unless physical interfaces change||some changes can be made using OMAPI without restart|
|DHCP Failover||DB failover coming in Kea 1.4||DHCPv4 failover only|
|Management interfaces||RESTful/http interface using JSON commands in Kea 1.2||OMAPI (command-line tool using customer syntax)|
|Integrations||Documented, supported ‘hooks’ api||Community-contributed LDAP integration (unsupported)|
|Lease Database||PostgreSQL, MySQL or memfile. Experimental Cassandra support in Kea 1.1||Local text file|
|DHCPv6 Prefix Delegation|
|Dynamic DNS updates (DDNS)|
|Option Assignment Determined by||Global, Subnet, Pool, Host|
Or specify via hooks application
|Global, Shared Network, Subnet, Class, Pool, Host|
|Retrieve Host Reservations from external database||PostgreSQL, MySQL in Kea 1.1||—|
|Statistics||Extensive, documented statistics||Logging on passing thresholds|
|Documentation||Developer documentation, Administrative Reference||embedded ‘man pages’|
|Operating System Support||RedHat Enterprise Linux, CentOS, Fedora and FreeBSD|
Builds on: most Linux and BSD variants, including MacOSX
|Linux and Unix variants, Solaris, HP/UX & AIX with a single network interface|
|Bug Database||public Trac issue database||private, mailto: email@example.com|
|Community Support||Kea User’s mailing list||DHCP-users mailing list|
|Professional 7 x 24 Support from ISC|
Advice for ISC DHCP Users
You may be wondering whether we recommend you migrate from ISC DHCP to Kea at this time.
- Use Kea if you need higher performance
- Use Kea if you are modernizing your infrastructure
- Use Kea if you need to tie your DHCP system to your own provisioning system
- Use Kea for your DHCP server needs
If Kea is missing a minor feature you need
- Consider requesting a custom-developed hooks application
- Kea hooks can do everything from re-writing options in the packet to triggering external applications
Continue to use ISC DHCP if
- You need DHCPv4 failover (note that HA implementations of Kea are possible today using a HA database back end)
- If you are using legacy interfaces
Continue using ISC DHCP for client and relay functions
New to Kea? Check out these webinars.
Kea Webinar from our partners, Men and Mice. Men and Mice offer training classes for Kea.
Blog posts about Kea
ISC’s open source, including BIND, ISC DHCP and Kea, is sustained by software support contracts. Open source software is free...July 24, 2017
Kea 1.2.0 was released a couple of days ago. You may have noticed that there are two new premium...May 10, 2017
- May 1, 2017
- August 10, 2016
Kea engineers went to IETF hackathon in Berlin, teamed up with Sysrepo engineers and developed a prototype interface to…August 1, 2016
In the past, ISC has released all of its open-source software under a simple license that we created. It’s...December 8, 2015
Angelo Failla, Production Engineer, Facebook Why did Facebook need a new DHCP solution? We use dhcp for provisioning servers...July 8, 2015
We are actively working on Kea, our new DHCP server. Following the conclusion of the BIND 10 project, we...May 29, 2014