set_node_firewall_options

A write tool on the Proxmox MCP server.

SERVERProxmox MCP Server SOURCEgethosthewalrus/proxmox-mcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/gethosthewalrus-proxmox-mcp/set-node-firewall-options.md

WHAT IT DOES

What set_node_firewall_options does on Proxmox MCP Server

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

RISK

Why set_node_firewall_options is rated Medium

The tool modifies firewall options at the node level, which affects security posture and network access controls. This is a Write action (configuration change) rather than Destructive (no deletion), Execute (no code execution), or Read (causes state change). Severity is high because incorrect firewall settings can expose infrastructure or block legitimate access, impacting availability and security.

From the tool's definition Tool name 'set_node_firewall_options' indicates modification of firewall configuration on nodes. The action is reversible (options can be changed again), and the Proxmox context shows this modifies infrastructure settings rather than executing arbitrary code…

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs set_node_firewall_options safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Proxmox MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For set_node_firewall_options, this is the rule to start with:

set_node_firewall_options Rate-limited

set_node_firewall_options 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": {
    "set_node_firewall_options": {
      "limits": [
        {
          "counter": "set_node_firewall_options_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Proxmox MCP Server, apply this rule, and every set_node_firewall_options call is checked against it from then on.

FAQ

Questions about set_node_firewall_options

What does the set_node_firewall_options tool do? +

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

How do I enforce a policy on set_node_firewall_options? +

Register the Proxmox MCP Server MCP server in PolicyLayer and add a rule for set_node_firewall_options: 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 Proxmox MCP Server. Nothing to install.

What risk level is set_node_firewall_options? +

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

Can I rate-limit set_node_firewall_options? +

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

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

set_node_firewall_options is provided by the Proxmox MCP Server MCP server (gethosthewalrus/proxmox-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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