This record as markdown: /tools/aapanel-mcp/firewall-delete-port.md
What firewall_delete_port does on Aapanel
AI agents call firewall_delete_port to permanently remove resources in Aapanel, typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Why firewall_delete_port is rated Critical
Closing/deleting a firewall port is a destructive action that removes network access and cannot be trivially undone without manual intervention. While not data deletion, it irreversibly changes system security configuration with potential for service disruption. This exceeds Write severity due to the permanent nature of the change and blast radius (could disable critical services or access paths).
From the tool's definition Tool name is 'firewall_delete_port' and description states 'Close a port in the firewall.' The verb 'delete' and action of closing/removing a firewall port indicates irreversible modification of network access configuration.
Attacks that exploit this kind of access
The rule that runs firewall_delete_port safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Aapanel, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For firewall_delete_port, this is the rule to start with:
firewall_delete_port is removed from the agent's tool list entirely, so the agent never calls it. The rest of the server keeps working.
The button opens the PolicyLayer dashboard: create your workspace, connect Aapanel, apply this rule, and every firewall_delete_port call is checked against it from then on.
Questions about firewall_delete_port
Close a port in the firewall. It is categorised as a Destructive tool in the Aapanel MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Aapanel MCP server in PolicyLayer and add a rule for firewall_delete_port: 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 Aapanel. Nothing to install.
firewall_delete_port is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the firewall_delete_port 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 firewall_delete_port. 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.
firewall_delete_port is provided by the Aapanel MCP server (nipunanirmal/aapanel-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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