Open DHCP Server vs OpenIPAM

Open DHCP Server is free, open-source software that provides Dynamic Host Configuration Protocol service on Linux and self-hosted, on-premises deployments. It assigns addresses through static hosts and dynamic DHCP ranges, supporting up to 125 ranges on one server. Multiple zones can run on a single server, with BOOTP and relay-agent support. DHCP options may be set globally, for a range, or for an individual client, using string, IP, hexadecimal-string, or byte-array values without defining option types. Ranges can be filtered by MAC ranges, vendor options, and user options. Replicated fail-safe operation supports continuity, while lease status appears on an auto-refreshing HTML page. The project describes low CPU use, small executable size, and very low memory requirements. It is released under the GNU General Public License, with a GPL-2.0 repository license. The project says it suits experts and small or home deployments, including people without DHCP protocol knowledge.

OpenIPAM is a free, open-source IP address management and CMDB tool for network and infrastructure inventory. It manages CIDR subnets, IP assignments and reservations, duplicate-IP conflicts, VLANs, IP ranges, and subnet calculations. DHCP tracking covers scopes, leases, reservations, options, and utilization. Its inventory supports 14 host types, hardware lifecycle tracking, locations and racks, maintenance windows, and company records. It can run in a browser with local storage or use an optional Python Flask backend with server-side SQLite for multi-user access. Server mode adds SAML 2.0 single sign-on with Microsoft Entra ID, authenticated routes, and a REST API for entity management, cross-entity search, dashboard statistics, and JSON backup or import. The project describes signed session cookies with an eight-hour lifetime and user-attributed audit entries. CSV host import and JSON backup and restore, including DHCP data, are supported. Browser-mode data stays in the browser; server-mode data is stored in the server-side SQLite file. The plan costs nothing. Current browser support covers Chrome, Firefox, Safari, and Edge, with WebAssembly and ES6+ required.