Port scanner: Difference between revisions

All forms of port scanning rely on the assumption that the targeted host is compliant with [[Request for Comments|RFC]] [http://www.faqs.org/rfcs/rfc793.html 793 - Transmission Control Protocol]. Although this is the case most of the time, there is still a chance a host might send back strange packets or even generate [[False positive#Type I error|false positives]] when the TCP/IP stack of the host is non-RFC-compliant or has been altered. This is especially true for less common scan techniques that are [[Operating system|OS]]-dependent (FIN scanning, for example).<ref name=ERIK77>{{cite book |last1= Erikson |first1= Jon |title=HACKING the art of exploitation |edition=2nd |year= 1977 |publisher= NoStarch Press|location= San Francisco|isbn=1-59327-144-1 |page= 264 }}