Outline What is IP network scanning? Concepts, motivation Example Tool nmap Scanning types Host discovery port scanning Version detection OS detectionģ What is Scanning? Method to gather information regarding the devices running on the network Typically to discover services or servers on a network Which hosts are up? Which services are offering? Do not confuse with “host vulnerability scanner” which further explore a computer by testing for common vulnerabilities (nessus, SAINT)Ĥ Why Scanning? Network Security assessmentĮvaluation and Auditing the security Firewall Penetration Test (Policy auditing) IDS proof/evaluation Identifying unexpected new servers Identifying open ports for proactively protect the network (Network and security admin) attacking it (Hackers)Ī well known and free security scanner written by Fyodor ( First released Sin Phrack 51 “The Art of Port Scanning” ( Many updates since then: OS Detection ( Version scanning ARP Scanning Version 5.00 as of this doc Usage: nmap Ħ Why nmap An excellent tool Long history of development and supportĬontinuous development and improvements “Industry Standard” port scannerħ nmap features Host Discovery: Which host is alive? 2 What is IP network scanning? Example Tool Scanning types
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