December 2017
Intermediate to advanced
410 pages
11h 5m
English
Content preview from Enterprise Cloud Security and Governance
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3-way handshake
Just to revise, 3-way handshake is one of the mandatory processes which are part of TCP protocol for communication between two entities.
The following output is part of TCP 3-way handshake captured by tcpdump:
root@mykplabs:~$ sudo tcpdump –i wlan0 host 139.162.21.95
20:34:10.082148 IP 10.10.0.210.52251 > 139.162.21.95.80: Flags [S], seq 3508972439, win 29200, options [mss 1460,sackOK,TS val 4720684 ecr 0,nop,wscale 7], length 0
20:34:10.175930 IP 139.162.21.95.80 > 10.10.0.210.52251: Flags [S.], seq 1849891626, ack 3508972440, win 28960, options [mss 1326,sackOK,TS val 3482350049 ecr 4720684,nop,wscale 7], length 0
20:34:10.176028 IP 10.10.0.210.52251 > 139.162.21.95.80: Flags [.], ack 1, win 229, options [nop,nop,TS val ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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