# Vulnerability Scanning ## Overview This should be the first thing done before any kind of OSINT because of how long takes for scans to come back. The length can depend on the amount of IP's you have to scan and also how fast your internet speed is. Vulnerability Scanning is for making sure there's nothing glaringly bad out there facing the internet. Most of it is going to be manual, looking for anything of value through the scan logs. Giving this extra information to the client provides more value to them. [Nessus](https://www.tenable.com/products/nessus/nessus-essentials?source=post_page-----2f0cbae39b64--------------------------------) is a great tool for automated vulnerability scanning. ## Nessus Playbook * General * Advanced Scan * Add name and description * Add IP addresses in scope * Optionally schedule the scan * Discovery * Host Discovery - Default * Port Scanning * Scan all ports (1-65535) * Service Discovery - Default * Assessment * Web Applications * Turn on and enable generic web application tests * Advanced * Optionally change the amount of hosts scanned simultaneously --- # 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/methodology/vulnerability-scanning.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.