20.03.2015 Views

Análise de tráfego em redes TCP/IP com tcpdump - Eriberto.pro.br

Análise de tráfego em redes TCP/IP com tcpdump - Eriberto.pro.br

Análise de tráfego em redes TCP/IP com tcpdump - Eriberto.pro.br

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

• Flags <strong>TCP</strong>:<<strong>br</strong> />

O <strong>pro</strong>tocolo <strong>TCP</strong> - flags<<strong>br</strong> />

­ Syn (synchronize): inicia conexões.<<strong>br</strong> />

­ Fin (finish): finaliza conexões.<<strong>br</strong> />

­ Psh (push): envia dados.<<strong>br</strong> />

­ Ack (acknowledgment): confirmação <strong>de</strong> que é conhecido o<<strong>br</strong> />

número <strong>de</strong> sequência do próximo segmento a ser enviado pelo<<strong>br</strong> />

lado oposto.<<strong>br</strong> />

­ Rst (reset): “não entendi”.<<strong>br</strong> />

IMPORTANTE: as flags <strong>TCP</strong> são disparadas contra portas e<<strong>br</strong> />

somente a flag push possui payload.<<strong>br</strong> />

<strong>Eriberto</strong> ­ set. 14

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!