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
On 30 Mar 2007, in the Usenet newsgroup comp.security.firewalls, in article
<1175259164.504210.159720@l77g2000hsb.googlegroups.com>, Soapp wrote:
>I wonder why HPING3 has two different flags for setting TCP ACK...
[compton ~]$ whatis hping3
hping3 (8) - send (almost) arbitrary TCP/IP packets to network hosts
[compton ~]$
Versatility.
>-A --ack: Set ACK tcp flag.
>
>-L --tcpack: Set the TCP ack.
>
>There has to be a difference, but I don't know.....
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.
>Can someone through some light on that ?
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
> 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