share_ipv4_addresses

THE RISK

Medium Risk

Why share_ipv4_addresses needs a policy

This tool modifies network configuration by sharing IPv4 addresses between resources. This is a Write operation because it creates or modifies resource relationships reversibly (address sharing can be reconfigured or reverted).

From the tool's definition Tool name: 'share_ipv4_addresses'; Description: 'Configure IPv4 address sharing'. The verb 'Configure' indicates modification of network settings.

Documented attack patterns abuse exactly the kind of access share_ipv4_addresses gives an agent:

POLICY

How to control share_ipv4_addresses

PolicyLayer is an MCP gateway — it sits between your AI agents and Linode MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for share_ipv4_addresses:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "share_ipv4_addresses": {
      "limits": [
        {
          "counter": "share_ipv4_addresses_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

share_ipv4_addresses 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.

Create a free account and register Linode MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

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All 416 Linode MCP Server tools →

Write tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about share_ipv4_addresses

What does the share_ipv4_addresses tool do? +

Configure IPv4 address sharing. It is categorised as a Write tool in the Linode 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 share_ipv4_addresses? +

Register the Linode MCP Server MCP server in PolicyLayer and add a rule for share_ipv4_addresses: 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 Linode MCP Server. Nothing to install.

What risk level is share_ipv4_addresses? +

share_ipv4_addresses is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit share_ipv4_addresses? +

Yes. Add a rate_limit block to the share_ipv4_addresses 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 share_ipv4_addresses completely? +

Set action: deny in the PolicyLayer policy for share_ipv4_addresses. 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 share_ipv4_addresses? +

share_ipv4_addresses is provided by the Linode MCP Server MCP server (takashito/linode-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Linode MCP Server tool call.

Start from Linode MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →