May 2017
Intermediate to advanced
416 pages
21h 33m
English
Content preview from Nmap: Network Exploration and Security Auditing Cookbook - Second Edition
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Privileged versus unprivileged TCP SYN ping scan
Running a TCP SYN ping scan as an unprivileged user who can't send raw packets makes Nmap use the connect() system call to send the TCP SYN packet. In this case, Nmap distinguishes a SYN/ACK packet when the function returns successfully, and an RST packet when it receives an ECONNREFUSED error message.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.