create_firewall_rule

Создаёт новое правило в группе firewall. Обязательны direction (ingress/egress) и protocol (tcp/udp/icmp). Для tcp/udp можно указать port и cidr.

SERVERTimeweb SOURCEtimeweb-mcp

Medium RISK CLASS

Category Write

Parameters 63 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/timeweb-mcp/create-firewall-rule.md

WHAT IT DOES

What create_firewall_rule does on Timeweb

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

Parameter	Type	Required	Description
`cidr`	string	—	Сетевой адрес или подсеть в формате CIDR (IPv4 или IPv6, например: 2.2.2.2/32)
`port`	string	—	Порт или диапазон портов (например: '22' или '8000-8080'). Применимо только для tcp/udp.
`group_id`	string	Yes	ОБЯЗАТЕЛЬНОЕ ПОЛЕ - ID группы правил firewall
`protocol`	string	Yes	ОБЯЗАТЕЛЬНОЕ ПОЛЕ - протокол: tcp, udp или icmp
`direction`	string	Yes	ОБЯЗАТЕЛЬНОЕ ПОЛЕ - направление трафика: ingress (входящий) или egress (исходящий)
`description`	string	—	Описание правила (опц.)

Parameters from the server's own tool schema.

RISK

Why create_firewall_rule is rated Medium

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

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs create_firewall_rule safely

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

create_firewall_rule Rate-limited

create_firewall_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_rule": {
      "limits": [
        {
          "counter": "create_firewall_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 Timeweb, apply this rule, and every create_firewall_rule call is checked against it from then on.

FAQ

Questions about create_firewall_rule

What does the create_firewall_rule tool do? +

Создаёт новое правило в группе firewall. Обязательны direction (ingress/egress) и protocol (tcp/udp/icmp). Для tcp/udp можно указать port и cidr. It is categorised as a Write tool in the Timeweb MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does create_firewall_rule accept? +

create_firewall_rule accepts 6 parameters: cidr, port, group_id, protocol, direction, description. Required: group_id, protocol, direction. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on create_firewall_rule? +

Register the Timeweb MCP server in PolicyLayer and add a rule for create_firewall_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 Timeweb. Nothing to install.

What risk level is create_firewall_rule? +

create_firewall_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_rule? +

Yes. Add a rate_limit block to the create_firewall_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_rule completely? +

Set action: deny in the PolicyLayer policy for create_firewall_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_rule? +

create_firewall_rule is provided by the Timeweb MCP server (timeweb-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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