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Monsoon

Free plan APILinuxMacSelf-hostedWebWindows

What Monsoon is

Monsoon combines DHCP service and IP address management in a self-hosted platform distributed as one Go binary. It supports DHCPv4 and DHCPv6, including relay information, prefix delegation, stateless mode, and dynamic DNS updates. Its IPAM tools include subnet hierarchies, CIDR tools, capacity planning, network discovery, conflict detection, and an audit trail. An embedded web dashboard provides views for subnets, IP addresses, leases, reservations, discovery, audits, and settings.

For programmatic access, Monsoon provides REST and gRPC APIs, WebSocket events, and an MCP server. Listed integrations include Slack and generic JSON webhooks, along with Prometheus metrics. Migration tools cover ISC DHCP, Kea, phpIPAM, NetBox, and CSV data. Embedded storage uses a B+Tree index, write-ahead log, periodic snapshots, and crash recovery.

Deployment examples use systemd and Docker. The current build supports local authentication; LDAP configuration is not supported. High availability is basic active-passive heartbeat and lease synchronization for controlled environments, with limited operational scope. Discovery supports scheduled or manual scans and limited active probe enrichment; passive rogue-DHCP sensing is not implemented. Monsoon is free and open source under Apache 2.0. It is self-hosted, and multi-tenant SaaS is out of scope for v1.

Who it suits

Monsoon suits network teams that want DHCP and IP address management together, with subnet planning, IPv6 support, audit history, and API access. It is aimed at organizations able to run and operate a self-hosted service, including through systemd or Docker deployment.

What it does well

Combines DHCP service and IP address management in one Go binary.
Supports DHCPv4, DHCPv6, prefix delegation, and stateless mode.
Includes subnet hierarchy, capacity planning, and conflict detection.
Provides REST and gRPC APIs, WebSocket events, and an MCP server.
Migration tools cover ISC DHCP, Kea, phpIPAM, NetBox, and CSV.
Apache 2.0 licensed and free.

What to know first

Self-hosted deployment is required; multi-tenant SaaS is out of scope for v1.
The current build supports local authentication only; LDAP configuration is unsupported.
High availability has limited operational scope for controlled environments.
Passive rogue-DHCP sensing is not implemented.

Getting started

Open the Monsoon GitHub project website.
Choose a supported platform: Linux, FreeBSD, macOS, or Windows; DHCP support is limited on macOS and Windows.
Deploy it using the systemd or Docker examples.
Use the embedded web dashboard, APIs, or MCP server to access Monsoon.

Verdict

Choose Monsoon if you want a free, open-source, self-hosted platform that brings DHCPv4, DHCPv6, and IPAM together with APIs and migration tools. Look elsewhere if you need LDAP authentication, passive rogue-DHCP sensing, or broadly scoped high availability.

Questions

Is Monsoon free?

Yes. Its pricing model is free, and the project is open source under the Apache 2.0 license.

Which operating systems does Monsoon support?

The listed platforms include Linux, FreeBSD, macOS, and Windows. DHCP support is limited on macOS and Windows.

Does Monsoon support IPv6?

Yes. It supports DHCPv6, including prefix delegation and stateless mode.

Can Monsoon be hosted as a multi-tenant service?

Monsoon is self-hosted, and multi-tenant SaaS is out of scope for v1.

Does the current build support LDAP authentication?

No. The current build supports local authentication only, and LDAP configuration is not supported.

What migration sources are covered?

Migration tools cover ISC DHCP, Kea, phpIPAM, NetBox, and generic CSV data.

Facts from Monsoon's own pages

APIs: Monsoon provides REST and gRPC APIs, WebSocket events, and an MCP server. · github.com, 4 Oct 2026
Authentication limit: The current build supports local authentication only; LDAP configuration is not supported by the current binary. · github.com, 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, 4 Oct 2026
Dashboard: The embedded web dashboard includes subnet, IP address, lease, reservation, discovery, audit, and settings views. · github.com, 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, 4 Oct 2026
DHCP: It supports DHCPv4 and DHCPv6, including features such as relay information, prefix delegation, and dynamic DNS updates. · github.com, 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, 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, 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, 4 Oct 2026
IPAM: Its IPAM features include subnet hierarchy, CIDR tools, capacity planning, network discovery, conflict detection, and an audit trail. · github.com, 4 Oct 2026
License: The repository states that Monsoon is licensed under Apache 2.0. · github.com, 4 Oct 2026
Migration: Import tools cover ISC DHCP, Kea, phpIPAM, NetBox, and generic CSV data. · github.com, 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, 4 Oct 2026
Platforms: The README lists Linux, FreeBSD, macOS, and Windows support; DHCP is limited on macOS and Windows. · github.com, 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, 4 Oct 2026
Protocols: The project lists DHCPv4 and DHCPv6 support, including DHCPv6 prefix delegation and stateless mode. · github.com, 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, 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, 4 Oct 2026
Storage: It uses embedded storage with a B+Tree index, write-ahead log, periodic snapshots, and crash recovery. · github.com, 4 Oct 2026

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