AI agents use pfsense_replace_services_service_watchdogs 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 service watchdog settings, which control how services are monitored and restarted. While reversible (configurations can be replaced again), the high severity reflects that disabling or misconfiguring service watchdogs could cause critical services to fail or remain down undetected, impacting firewall availability and security posture.
From the tool's definition Tool uses PUT method to replace service watchdog configurations in pfSense firewall. PUT indicates modification of existing resources. Service watchdogs monitor and manage service availability/restart behavior.
Attacks that exploit this kind of access
PUT /api/v2/services/service_watchdogs. 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_replace_services_service_watchdogs: 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_replace_services_service_watchdogs 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_replace_services_service_watchdogs 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_replace_services_service_watchdogs. 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_replace_services_service_watchdogs 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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