Re: Request for discussion on defending against specific Nmap TCP syn and version scans.

From: ober (ober@linbsd.org)
Date: Fri Mar 03 2006 - 14:57:42 EST


http://www.linbsd.org/wafter.c is a OpenBSD kernel module that does this.
Well atleast hides from nmap, and could be setup to tarpit.

-Ober

Richard Chesler: [Reading a piece of paper] The first rule of Fight Club is you don't talk about Fight Club?
Narrator: [Voice-over] I'm half asleep again; I must've left the original in the copy machine.
Richard Chesler: The second rule of Fight Club - is this yours?
Narrator: Huh?
Richard Chesler: Pretend you're me, make a managerial decision: you find this, what would you do?

On Thu, 2 Mar 2006, Aaron wrote:

> Date: Thu, 02 Mar 2006 16:46:25 -0800
> From: Aaron <microchp@microchp.org>
> To: pen-test@securityfocus.com
> Subject: Re: Request for discussion on defending against specific Nmap TCP syn
> and version scans.
>
> There may also be some interest in looking up tarpitting. It does not stop
> scanning but maybe be used in conjunction with changing the OS fingerprint to
> slow a scan lower the accuracy of the results as threads will time out. If
> used on enough addresses, it can make enumeration a pita.
>
> Also change the default TTL.
>
> Honeyd and DTK are also fun to play with but may draw the wrong attention to
> your address space.
>
> If you really want to confuse nmap, dont run any firewalls, turn on all
> services and leave everything default. ;)
>
>
> --Aarön
>
>
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