# firewall_get_rules

Get OPNsense firewall rules

Agent View of the PolicyLayer registry record for `firewall_get_rules`. HTML page: https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/firewall-get-rules

## Facts

- Tool: `firewall_get_rules`
- Server: OPNsense MCP Server (`fakebizprez/opnsense-mcp-server`) — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server.md
- Homepage: https://github.com/fakebizprez/opnsense-mcp-server
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Allowed

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "firewall_get_rules",
    "arguments": {}
  }
}
```

## Why firewall_get_rules is rated Low

This tool retrieves firewall rules from OPNsense without any side effects. It is a read-only query operation that returns existing configuration data. While firewall rules are security-sensitive information, the tool merely retrieves them without executing, modifying, or deleting them. Severity is low because reading firewall configuration poses minimal risk compared to execution or destructive operations.

From the tool's own definition: "Tool name 'firewall_get_rules' and description 'Get OPNsense firewall rules' indicate data retrieval with no modification or deletion of firewall rules."

## Use case

AI agents call firewall_get_rules to retrieve information from OPNsense MCP Server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

## Recommended policy (PolicyLayer)

Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches OPNsense MCP Server:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "firewall_get_rules": {}
  }
}
```

## Other tools on OPNsense MCP Server (21)

- `delete_from_alias` — Destructive — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/delete-from-alias.md
- `firewall_delete_rule` — Destructive — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/firewall-delete-rule.md
- `exec_api_call` — Execute — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/exec-api-call.md
- `install_plugin` — Execute — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/install-plugin.md
- `restart_service` — Execute — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/restart-service.md
- `firewall_toggle_rule` — Read — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/firewall-toggle-rule.md
- `get_api_endpoints` — Read — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/get-api-endpoints.md
- `get_dhcp_leases` — Read — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/get-dhcp-leases.md
- `get_firewall_aliases` — Read — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/get-firewall-aliases.md
- `get_firewall_logs` — Read — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/get-firewall-logs.md
- `get_interfaces` — Read — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/get-interfaces.md
- `get_system_health` — Read — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/get-system-health.md
- `get_system_routes` — Read — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/get-system-routes.md
- `get_system_status` — Read — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/get-system-status.md
- `get_vpn_connections` — Read — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/get-vpn-connections.md
- `list_plugins` — Read — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/list-plugins.md
- `perform_firewall_audit` — Read — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/perform-firewall-audit.md
- `add_to_alias` — Write — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/add-to-alias.md
- `backup_config` — Write — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/backup-config.md
- `configure_opnsense_connection` — Write — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/configure-opnsense-connection.md
- `firewall_add_rule` — Write — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/firewall-add-rule.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=fakebizprez-opnsense-mcp-server · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/fakebizprez-opnsense-mcp-server