pfsense_create_interface_bridge · Pfsense MCP: Risk & Policy

WHAT IT DOES

What pfsense_create_interface_bridge does on Pfsense

AI agents use pfsense_create_interface_bridge to create or update resources in Pfsense — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Pfsense environment.

WHY IT NEEDS A POLICY

Why pfsense_create_interface_bridge needs a policy

Creating a network bridge interface is a Write operation that modifies firewall/network configuration. This is high severity because misconfiguring network bridges on a firewall can significantly impact network segmentation and security posture. Confidence is reduced due to empty description.

From the tool's definition Tool name 'pfsense_create_interface_bridge' suggests creating a network bridge interface on a pfSense firewall. Description is empty.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

pfsense_create_interface_bridge Rate-limited

pfsense_create_interface_bridge stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "pfsense_create_interface_bridge": {
      "limits": [
        {
          "counter": "pfsense_create_interface_bridge_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Pfsense, so you can run agents against it safely.

FAQ

Questions about pfsense_create_interface_bridge

What does the pfsense_create_interface_bridge tool do? +

pfsense_create_interface_bridge. It is categorised as a Write tool in the Pfsense MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on pfsense_create_interface_bridge? +

Register the Pfsense MCP server in PolicyLayer and add a rule for pfsense_create_interface_bridge: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Pfsense. Nothing to install.

What risk level is pfsense_create_interface_bridge? +

pfsense_create_interface_bridge is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit pfsense_create_interface_bridge? +

Yes. Add a rate_limit block to the pfsense_create_interface_bridge rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block pfsense_create_interface_bridge completely? +

Set action: deny in the PolicyLayer policy for pfsense_create_interface_bridge. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides pfsense_create_interface_bridge? +

pfsense_create_interface_bridge is provided by the Pfsense MCP server (abl030/pfsense-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.