disable_firewall · Firegex MCP: Risk & Policy

WHAT IT DOES

What disable_firewall does on Firegex

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

WHY IT NEEDS A POLICY

Why disable_firewall needs a policy

An AI agent can call disable_firewall faster than any human can review — one bad instruction and it creates or modifies resources in Firegex by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

disable_firewall Rate-limited

disable_firewall 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": {
    "disable_firewall": {
      "limits": [
        {
          "counter": "disable_firewall_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 Firegex, so you can run agents against it safely.

FAQ

Questions about disable_firewall

What does the disable_firewall tool do? +

Deactivate the nftables firewall ruleset (all rules unloaded). It is categorised as a Write tool in the Firegex MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on disable_firewall? +

Register the Firegex MCP server in PolicyLayer and add a rule for disable_firewall: 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 Firegex. Nothing to install.

What risk level is disable_firewall? +

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

Can I rate-limit disable_firewall? +

Yes. Add a rate_limit block to the disable_firewall 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 disable_firewall completely? +

Set action: deny in the PolicyLayer policy for disable_firewall. 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 disable_firewall? +

disable_firewall is provided by the Firegex MCP server (umbra2728/firegex-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.