dnscat_client
A execute tool on the Pentester- MCP server.
This record as markdown: /tools/halilkirazkaya-pentester-mcp/dnscat-client.md
What dnscat_client does on Pentester-MCP
AI agents invoke dnscat_client to trigger actions in Pentester-MCP. 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 dnscat_client is rated High
dnscat_client would establish DNS-based tunnels for command execution and data exfiltration—core Execute capabilities. While the description is empty, the tool name combined with server context and sibling tools strongly indicates this performs active network operations (tunneling, C2 communication) whose effects are contingent on attacker-supplied arguments.
From the tool's definition Tool name 'dnscat_client' references dnscat, a DNS tunneling tool commonly used in penetration testing to establish covert command-and-control channels.
Attacks that exploit this kind of access
The rule that runs dnscat_client safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Pentester-MCP, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For dnscat_client, this is the rule to start with:
dnscat_client 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 Pentester-MCP, apply this rule, and every dnscat_client call is checked against it from then on.
Questions about dnscat_client
dnscat_client is a execute tool on the Pentester MCP server. It is categorised as a Execute tool in the Pentester-MCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Pentester MCP server in PolicyLayer and add a rule for dnscat_client: 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 Pentester-MCP. Nothing to install.
dnscat_client 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 dnscat_client 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 dnscat_client. 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.
dnscat_client is provided by the Pentester MCP server (halilkirazkaya/pentester-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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