full-disclosure - Re: SYN ACK scans to random ports

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date: Tue, 24 Sep 2013 21:02:59 +0200
From: Jan Murawski <der@...goetze.de>
To: full-disclosure@...ts.grok.org.uk
Subject: Re: SYN ACK scans to random ports

For example nmap can randomize the list of scanned ports. I guess, that
is supposed to confuse people :)


Le 24/09/2013 16:34, Fabio a écrit :
> Il 24/09/13 14:49, silence_is_best@...hmail.com ha scritto:
>> Can someone explain the point of a SYN ACK scan to random high ports?  I
>> usually see a fair amount of these...at first I thought it was maybe a
>> block to an initiating SYN packet, but I don't see any evidence that the
>> SYN ACK isn't the first packet seen.  Danke.
> 
> 
> Typically an ACK or SYN ACK scan is used to map out firewall rulesets,
> determining whether they are stateful or not and which ports are filtered.
> 
> _______________________________________________
> Full-Disclosure - We believe in it.
> Charter: http://lists.grok.org.uk/full-disclosure-charter.html
> Hosted and sponsored by Secunia - http://secunia.com/
> 
> 





Download attachment "signature.asc" of type "application/pgp-signature" (837 bytes)

_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/