Sabuesos De Red

Sabuesos en la Red: El escaneo de puertos

http://www.death-master.tk/

Sabuesos en la Red:

El escaneo de
puertos
Autor:

Death Master

Death Master, 2004 (GFDL)

Página 1

Sabuesos en la Red: El escaneo de puertos

http://www.death-master.tk/

Índice de contenidos
Índice decontenidos..........................................................................................................................2
Introducción.............................................................................................................................................3
Conceptos básicos..............................................................................................................................4
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Estableciendo conexiones:sockets, puertos e IP's....................................................................4
Cabeceras de paquetes TCP, UDP e ICMP...................................................................................5
Flags TCP........................................................................................................................................8
Aspectos importantes enconexiones TCP..................................................................................9

Técnicas de escaneo.......................................................................................................................12
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TCPconnect()................................................................................................................................12
TCP SYN........................................................................................................................................13
TCP FIN..........................................................................................................................................14
UDPscan.......................................................................................................................................14
ACK scan.......................................................................................................................................15
Null scan........................................................................................................................................16
Xmasscan.....................................................................................................................................16
SYN/ACK scan...............................................................................................................................17
Pingsweep....................................................................................................................................17

Técnicas avanzadas.........................................................................................................................19
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Reverse Ident................................................................................................................................19
Zombiescan..................................................................................................................................20
FTP bounce scan..........................................................................................................................21
Fragmentación TCP......................................................................................................................22

Detección delfingerprint..............................................................................................................23
Protección frente a escaneos...................................................................................................26
Introducción a NMAP.......................................................................................................................27...