The Nmap Reference Guide provides comprehensive information on Nmap, a security scanner developed by Insecure.Com LLC. It covers topics such as port scanning, TCP window probing, target selection options, output formats, ping avoidance, discovery probes, and probe database usage. The guide emphasizes the importance of understanding port filtering and differentiating between open, closed, and filtered ports. It also highlights the significance of TCP window probing in distinguishing between open and closed ports. Additionally, it discusses target selection options, including the use of the -iL flag for specifying target lists. The guide details various output formats available in Nmap, such as XML, and explains how to disable ping with the -P0 option. It also delves into the use of discovery probes to bypass strict firewalls and the probe database for identifying services and versions. Lastly, the guide acknowledges the translation of the document into Spanish, noting that while efforts have been made to make it accessible to Spanish-speaking readers, it may not be as up-to-date as the official English version
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