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Monsoon
What it is
Monsoon is a free, open-source, self-hosted platform that combines DHCP service and IP address management in one Go binary. It supports DHCPv4 and DHCPv6, including relay information, prefix delegation, stateless mode, and dynamic DNS updates. IPAM tools cover subnet hierarchies, CIDR work, capacity planning, network discovery, conflict detection, and audit history. An embedded dashboard provides subnet, address, lease, reservation, discovery, audit, and settings views. REST and gRPC APIs, WebSocket events, and an MCP server provide programmatic access. Integrations include Slack and generic JSON webhooks, Prometheus metrics, and import tools for ISC DHCP, Kea, phpIPAM, NetBox, and CSV. Embedded storage uses a B+Tree index, write-ahead logging, snapshots, and crash recovery. Deployment examples use systemd and Docker. The current build supports local authentication only, without LDAP configuration. High availability is limited to basic active-passive heartbeat and lease synchronization for controlled environments. Discovery uses scheduled or manual scans with limited active probe enrichment; passive rogue-DHCP sensing is not implemented.
For and against
For
- Combines DHCP and IPAM
- Supports DHCPv4 and DHCPv6
- Includes subnet planning and audit history
- REST, gRPC, WebSocket, and MCP access
- Apache 2.0 open-source license
Against
- Local authentication only
- LDAP configuration is unsupported
- High availability has limited scope
- Passive rogue-DHCP sensing is unavailable
The verdict
Monsoon brings network addressing, DHCP, discovery, and auditing into one self-hosted system. Its local-authentication requirement and limited HA and discovery scope should guide deployment planning.
Who it suits
Monsoon fits administrators who want self-hosted DHCP and IPAM across Linux, FreeBSD, macOS, or Windows. It is intended for controlled environments rather than multi-tenant SaaS deployments.
On the record
- APIs
- Monsoon provides REST and gRPC APIs, WebSocket events, and an MCP server.github.com · read 4 Oct 2026
- Authentication limit
- The current build supports local authentication only; LDAP configuration is not supported by the current binary.github.com · read 4 Oct 2026
- Availability
- The README describes Monsoon as self-hosted only and says multi-tenant SaaS is out of scope for v1.github.com · read 4 Oct 2026
- Dashboard
- The embedded web dashboard includes subnet, IP address, lease, reservation, discovery, audit, and settings views.github.com · read 4 Oct 2026
- Deployment and audience
- Monsoon is self-hosted, with systemd and Docker deployment examples; multi-tenant SaaS is out of scope for v1.github.com · read 4 Oct 2026
- DHCP
- It supports DHCPv4 and DHCPv6, including features such as relay information, prefix delegation, and dynamic DNS updates.github.com · read 4 Oct 2026
- Discovery limit
- Discovery currently supports scheduled or manual scans and limited active probe enrichment; true passive rogue-DHCP sensing is not implemented.github.com · read 4 Oct 2026
- High availability
- HA is described as basic active-passive heartbeat and lease synchronization for controlled environments, with limited-scope operational support.github.com · read 4 Oct 2026
- Integrations
- The project lists Slack and generic JSON webhooks, Prometheus metrics, and migration tools for ISC DHCP, Kea, phpIPAM, NetBox, and CSV.github.com · read 4 Oct 2026
- IPAM
- Its IPAM features include subnet hierarchy, CIDR tools, capacity planning, network discovery, conflict detection, and an audit trail.github.com · read 4 Oct 2026
- License
- The repository states that Monsoon is licensed under Apache 2.0.github.com · read 4 Oct 2026
- Migration
- Import tools cover ISC DHCP, Kea, phpIPAM, NetBox, and generic CSV data.github.com · read 4 Oct 2026
- Operational limit
- The README describes HA as basic heartbeat and lease synchronization for controlled environments, with limited-scope operational support.github.com · read 4 Oct 2026
- Platform support
- The listed supported platforms are Linux, FreeBSD, macOS, and Windows; DHCP support is limited on macOS and Windows.github.com · read 4 Oct 2026
- Protocols
- The project lists DHCPv4 and DHCPv6 support, including DHCPv6 prefix delegation and stateless mode.github.com · read 4 Oct 2026
- Purpose
- Monsoon is an open-source platform that combines a DHCP server and IP address management in one Go binary.github.com · read 4 Oct 2026
- Security
- The README describes local authentication, configurable TLS, rate limits, temporary lockouts, secure session cookies, defensive response headers, and auditing of security-related authentication events.github.com · read 4 Oct 2026
- Storage
- It uses embedded storage with a B+Tree index, write-ahead log, periodic snapshots, and crash recovery.github.com · read 4 Oct 2026
