This record as markdown: /tools/ahmeth4n-renef-mcp/renef-port-forward-add.md
What renef_port_forward_add does on Renef
AI agents invoke renef_port_forward_add to trigger actions in Renef. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.
Why renef_port_forward_add is rated High
Adding a port forwarding rule is an external system operation that modifies network routing configuration. It triggers changes to the device's network stack, enabling external connections to be redirected. This is an Execute-level action as it configures infrastructure with potentially significant security implications (exposing internal services), though it can typically be reversed by removing the rule.
From the tool's definition Adds a port forwarding rule for renef
Attacks that exploit this kind of access
The rule that runs renef_port_forward_add safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Renef, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For renef_port_forward_add, this is the rule to start with:
renef_port_forward_add stays usable, but rate-capped: a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Renef, apply this rule, and every renef_port_forward_add call is checked against it from then on.
Questions about renef_port_forward_add
Adds a port forwarding rule for renef. It is categorised as a Execute tool in the Renef MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Renef MCP server in PolicyLayer and add a rule for renef_port_forward_add: 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 Renef. Nothing to install.
renef_port_forward_add is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the renef_port_forward_add 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.
Set action: deny in the PolicyLayer policy for renef_port_forward_add. 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.
renef_port_forward_add is provided by the Renef MCP server (ahmeth4n/renef-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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