> For the complete documentation index, see [llms.txt](https://pnpt.adot8.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://pnpt.adot8.com/external-pentest-playbook/common-pentest-findings/unexpected-perimeter-services.md).

# 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.