AI agents use pfsense_update_firewall_traffic_shaper_limiter_bandwidth to create or update resources in Pfsense — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Pfsense environment.
This tool modifies firewall traffic shaping limiter bandwidth settings, which is a reversible configuration change (Write category). It rates as 'high' severity because misconfiguring bandwidth limiters on a firewall could disrupt critical network traffic, cause denial of service to legitimate users, or enable malicious traffic by removing rate limits.
From the tool's definition Tool name indicates 'update' operation on 'firewall_traffic_shaper_limiter_bandwidth'. The server description states it gives 'full control over pfSense firewalls' with tools covering 'traffic shaper' operations.
Attacks that exploit this kind of access
pfsense_update_firewall_traffic_shaper_limiter_bandwidth. It is categorised as a Write tool in the Pfsense MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Pfsense MCP server in PolicyLayer and add a rule for pfsense_update_firewall_traffic_shaper_limiter_bandwidth: 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 Pfsense. Nothing to install.
pfsense_update_firewall_traffic_shaper_limiter_bandwidth is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the pfsense_update_firewall_traffic_shaper_limiter_bandwidth 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 pfsense_update_firewall_traffic_shaper_limiter_bandwidth. 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.
pfsense_update_firewall_traffic_shaper_limiter_bandwidth is provided by the Pfsense MCP server (abl030/pfsense-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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