HPING3

I wonder why HPING3 has two different flags for setting TCP ACK...

-A --ack: Set ACK tcp flag.

-L --tcpack: Set the TCP ack.

There has to be a difference, but I don't know.....

Can someone through some light on that ?

thanks

Soapp

[compton ~]$ whatis hping3 hping3 (8) - send (almost) arbitrary TCP/IP packets to network hosts [compton ~]$

Versatility.

0793 Transmission Control Protocol. J. Postel. September 1981. (Format: TXT=172710 bytes) (Updated by RFC3168) (Also STD0007) (Status: STANDARD)

Section 3.1 - you can find the RFC using the same search engine you are posting from.

What is the difference between 12th bit in the fourth 32 bit word (ACK) of a TCP header and the entire third 32 bit word of the header?

Old guy

Oh, I see,

-L --tcpack, sets the 32 Bit TCP ackknowledge Number :)

Thank you