create_firewall_group_rule

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/create-firewall-group-rule.md

WHAT IT DOES

What create_firewall_group_rule does on Proxmox MCP Server

AI agents use create_firewall_group_rule 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 create_firewall_group_rule is rated Medium

This tool creates (writes) new firewall group rules in Proxmox infrastructure. While the description is empty, the name and context clearly indicate a Write operation that modifies firewall configuration. Severity is high because misconfigured firewall rules can expose infrastructure to security threats, create network access problems, or disrupt service availability.

From the tool's definition Tool name 'create_firewall_group_rule' indicates it creates a new firewall rule. The sibling tools include firewall operations ('add_firewall_ipset_entry'), virtual machine lifecycle management, and storage operations, all on a Proxmox infrastructure…

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs create_firewall_group_rule 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 create_firewall_group_rule, this is the rule to start with:

create_firewall_group_rule Rate-limited

create_firewall_group_rule 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": {
    "create_firewall_group_rule": {
      "limits": [
        {
          "counter": "create_firewall_group_rule_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 create_firewall_group_rule call is checked against it from then on.

FAQ

Questions about create_firewall_group_rule

What does the create_firewall_group_rule tool do? +

create_firewall_group_rule 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 create_firewall_group_rule? +

Register the Proxmox MCP Server MCP server in PolicyLayer and add a rule for create_firewall_group_rule: 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 create_firewall_group_rule? +

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

Can I rate-limit create_firewall_group_rule? +

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

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

create_firewall_group_rule 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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