# Kea 3.1.7 Release Notes, March 25, 2026 Welcome to Kea 3.1.7, a release of the 3.1 development series. As with any other development release, use this with caution: development releases are not recommended for production use. Kea is a DHCP implementation developed by Internet Systems Consortium (ISC) that features DHCPv4 and DHCPv6 servers with DNS update and a REST API; optional database support (MySQL and PostgreSQL); optional RADIUS, YANG/NETCONF, and Kerberos GSS-TSIG support; and much more. Kea provides extensive management capabilities, including but not limited to: TLS support, Role-Based Access Control, run-time configuration monitoring and updates via a REST API, host reservations, and client classification. The text below references issue numbers. For more details, visit the Kea GitLab page at https://gitlab.isc.org/isc-projects/kea/-/issues. For details about Docker issues, visit the page at https://gitlab.isc.org/isc-projects/kea-docker/-/issues/. For details about packaging, visit the page at https://gitlab.isc.org/isc-projects/kea-packaging/-/issues/. The following bug fixes and features have been implemented since the previous release: 1. **Interfaces and sockets**: Kea DHCP servers now properly handle traffic through VLAN interfaces [#1117, #1738, #3792]. Kea DHCPv6 servers can now receive packets sent to the All_DHCP_Servers (ff05::1:3) site multicast address, as required by the standard [#3574]. Multicast sockets are now properly opened after retrying [#4360]. 2. **Bug fixes**: Previously, the internal lease manager was not reconstructed after reconfiguration was attempted with an invalid configuration that would make it non-responsive to DHCP requests; this has been fixed [#4389]. A potential race was fixed on the DHCP packet receiver [#4231]. Previously, Kea servers accepted non-DHCP traffic on their DHCP sockets during startup; this has been fixed [#4279]. The Kea control agent would crash when being configured with a control socket that lacked a socket-name entry; this has been fixed [#4365]. 3. **Build improvements**: We slightly improved compatibility with OpenSSL when the OPENSSL_NO_DEPRECATED macro is defined [#4338]. ## Incompatible Changes There are no incompatible changes. ## License This version of Kea is released under the Mozilla Public License, version 2.0. https://www.mozilla.org/en-US/MPL/2.0 Some Kea hook libraries are provided under the MPL 2.0; others are licensed with the [Kea Hooks Basic Commercial End User License](https://www.isc.org/kea-premium-license/). The source for each hook library includes the applicable license. ## Download Pre-built ISC packages for current versions of the most popular Linux operating systems are available at: https://cloudsmith.io/~isc/repos/ Pre-built Docker images, as well as Docker files, are available. For details, see: https://gitlab.isc.org/isc-projects/kea-docker The Kea source and PGP signature for this release may be downloaded from: https://www.isc.org/download The signature was generated with the ISC code-signing key, which is available at: https://www.isc.org/pgpkey ISC provides detailed documentation, including installation instructions and usage tutorials, in the Kea Administrator Reference Manual. Documentation is included with the installation or at https://kea.readthedocs.io/en/latest/index.html in HTML, PDF, or EPUB formats. ISC maintains a public open source code tree, wiki, issue tracking system, milestone planner, and roadmap at https://gitlab.isc.org/isc-projects/kea. Limitations and known issues with this release can be found at https://gitlab.isc.org/isc-projects/kea/-/wikis/known-issues-list. We ask users of this software to please let us know how it worked for you and what operating system you tested on. Feel free to share your feedback on the Kea Users mailing list (https://lists.isc.org/mailman/listinfo/kea-users). We would also like to hear whether the documentation is adequate and accurate. Please open tickets in the Kea GitLab project for bugs, documentation omissions and errors, and enhancement requests. We want to hear from you even if everything worked. ## Support Professional support for Kea is available from ISC. We encourage all professional users to consider this option; Kea maintenance is funded with support subscriptions. For more information on ISC's Kea software support, see https://www.isc.org/support/. Free best-effort support is provided by our user community via a mailing list. Information on all public email lists is available at https://www.isc.org/community/mailing-list. If you have any comments or questions about working with Kea, please share them to the Kea Users list (https://lists.isc.org/mailman/listinfo/kea-users). Bugs and feature requests may be submitted via GitLab at https://gitlab.isc.org/isc-projects/kea/-/issues. ## Changes The following summarizes the changes since the previous release. 2452. [build] andrei The library version numbers have been bumped up for the Kea 3.1.7 development release. (Gitlab #4419) 2451. [func] razvan The kea servers return a new status ("result" with value 5) for commands which have failed and have partially altered the running configuration. The rollback mechanism was not able to restore the previous configuration. (Gitlab #4389) 2450. [bug] fdupont Kea DHCPv6 servers can now receive packets sent to the All_DHCP_Servers (ff05::1:3) site multicast address as required by the standard. (Gitlab #3574) 2449. [sec] razvan Fix a null dereference when configuring the control agent with a control socket that lacks a socket-name entry. (Gitlab #4365) 2448. [func] razvan When using raw sockets, Kea now properly handles VLAN interfaces and VLAN tagged packets. (Gitlab #1117, #1738, #3792) Thank you again to everyone who assisted us in making this release possible. We look forward to receiving your feedback.