Do keep in mind that version scans are not always 100% accurate, but it does take you one step closer to successfully getting into a system. Nmap will provide a list of services with its versions. To do a version scan, use the ‘-sV’ command. You can then use it to attack a machine using an exploitation tool like Metasploit. It makes your life easier since you can find an existing vulnerability from the Common Vulnerabilities and Exploits (CVE) database for a particular version of the service. Version scanningįinding application versions is a crucial part in penetration testing. Remember, stealth scanning is slower and not as aggressive as the other types of scanning, so you might have to wait a while to get a response. You can use the ‘-sS’ command to perform a stealth scan. However, a stealth scan never completes the 3-way handshake, which makes it hard for the target to determine the scanning system. If SYN/ACK is received, it means the port is open, and you can open a TCP connection. Stealth scanning is performed by sending an SYN packet and analyzing the response. These ports are the ones used by popular services like SQL, SNTP, apache, and others.
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