mcp-pfsense

MCP server for managing pfSense firewalls through AI assistants like Claude, ChatGPT, and Copilot.

Requires: pfrest package installed on your pfSense instance (provides the REST API).

Features

17 tools across 6 categories:

Category	Tools	Description
System	get_system_status, get_interfaces	Version, CPU, memory, uptime, temperature, network interfaces
Firewall	list_firewall_rules, add_firewall_rule, delete_firewall_rule, list_firewall_aliases	Rule management with interface filtering, alias listing
DHCP	list_dhcp_leases, list_dhcp_static_mappings, add_dhcp_static_mapping, delete_dhcp_static_mapping	Active leases, IP reservations
DNS	list_dns_host_overrides, add_dns_host_override, delete_dns_host_override	Unbound DNS Resolver host overrides
Monitoring	get_gateway_status, get_arp_table, list_services	Gateway health, connected devices, service status
Services	restart_service	Restart any pfSense service

Safety

All destructive operations (delete rules, delete mappings, restart services) require two-step confirmation — the tool returns a warning on first call and only executes when called again with confirm=true.

Installation

# Using uvx (recommended)
uvx mcp-pfsense

# Using pip
pip install mcp-pfsense

Prerequisites

1. pfSense with pfrest package installed
2. A user account with API access (typically admin)

Configuration

Set environment variables:

Variable	Required	Default	Description
PFSENSE_HOST	Yes	—	pfSense hostname or IP
PFSENSE_PASSWORD	Yes	—	API user password
PFSENSE_USERNAME	No	admin	API username
PFSENSE_PORT	No	443	API port
PFSENSE_SCHEME	No	https	http or https
PFSENSE_VERIFY_SSL	No	false	Verify SSL certificate

Claude Desktop

Add to claude_desktop_config.json:

{
  "mcpServers": {
    "pfsense": {
      "command": "uvx",
      "args": ["mcp-pfsense"],
      "env": {
        "PFSENSE_HOST": "10.10.10.1",
        "PFSENSE_PASSWORD": "your-password"
      }
    }
  }
}

Claude Code

claude mcp add pfsense -- uvx mcp-pfsense

Then set environment variables in your shell or .env file.

Usage Examples

Once connected, ask your AI assistant:

• "What's the pfSense system status?"
• "Show me all firewall rules on the LAN interface"
• "List active DHCP leases"
• "Add a DNS entry for nas.home.lan pointing to 10.10.10.50"
• "What devices are connected to the network?" (ARP table)
• "Show gateway health and latency"
• "Create a firewall rule to allow TCP port 8080 on LAN"
• "Reserve IP 10.10.10.60 for MAC aa:bb:cc:dd:ee:20"

API Compatibility

• pfSense: 2.7.x (tested on 2.7.2)
• pfrest: v2.x (REST API v2)
• Python: 3.11+

Note: pfrest runs on nginx (port 80 by default), separate from the pfSense WebGUI (lighttpd on port 443). If your pfrest is configured on a non-standard port, set PFSENSE_PORT and PFSENSE_SCHEME accordingly.

Development

git clone https://github.com/antonio-mello-ai/mcp-pfsense.git
cd mcp-pfsense
python -m venv .venv
source .venv/bin/activate
pip install -e ".[dev]"

# Run tests
pytest

# Lint and type check
ruff check .
mypy src/

License

MIT