how to use tcpdump to capture packets with "ACK" flag set

Question

I want to capture packets with ACK flag set using tcpdump including SYN/ACK, data packet and ACK packets thanks

score 2 · Accepted Answer · answered Apr 07 '13 at 22:13

2

With the help of the manual,

tcpdump 'tcp[tcpflags] & (tcp-ack) != 0'

should do the trick

answered Apr 07 '13 at 22:13

Kdecherf

1 Answers1