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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How it works...
The smtp-strangeport script was submitted by Diman Todorov. It detects SMTP servers running on nonstandard ports, which is an indicator of rogue mail servers. If an SMTP server is found running on a port other than 25, 465, and 587, this script will notify you.
The arguments -sV --script smtp-strangeport make nmap start service detection and launch the NSE script smtp-strangeport which will compare the port numbers on which SMTP servers were found against the known port numbers 25, 465, and 587.
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