# Unexpected Perimeter Services ## Overview Services such as **RDP** or **Telnet** should not be facing the outside world. If you're able to access a machine via **RDP** over the internet that would be a unexpected perimeter service finding. They can use a whitelist of IP's that can access the service if they insist on keeping it outwards facing to combat having it fully exposed. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://pnpt.adot8.com/external-pentest-playbook/common-pentest-findings/unexpected-perimeter-services.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.