Penetration Testing
an anternative to port-knoking using the OpenBSD pf only Jan 23 2006 09:44PM
poplix (poplix papuasia org) (2 replies)
Re: an anternative to port-knoking using the OpenBSD pf only Feb 17 2006 08:52AM
gimeshell web de (1 replies)
On Mon, 23 Jan 2006 22:44:52 +0100
poplix <poplix (at) papuasia (dot) org [email concealed]> wrote:
>
> OUT (tcp.flags='syn')
> set(
> tcp.win='8192',ip.ttl='128',ip.flags.df='0',
> tcp.options='mss=3884+noop+wss=0+noop+noop+ts=TS'
> );
>
> This rule tells tripp to rewrite all outgoing tcp packets with
> the SYN
> flag set only allowing my first handshake packet to match "poplix"
> fingerprint.

Does an attacker who wants to attack a server include aspect that
this maybe a system utilizing port knocking in this way?
Perhaps if he has focused at this system?

Am i right to say, your invented os fingerprint is random and unique
and because of unlimited IP option field's length there's no
chance left for attacker to brute force ports with different option
field values et cetera to get correct option field + window size + ttl +
flag?

regards

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[ reply ]
Re: an anternative to port-knoking using the OpenBSD pf only Feb 20 2006 09:58PM
poplix (poplix papuasia org) (1 replies)
Re: an anternative to port-knoking using the OpenBSD pf only Feb 22 2006 10:00AM
Pete Herzog (lists isecom org) (1 replies)
Re: an anternative to port-knoking using the OpenBSD pf only Feb 27 2006 11:09PM
poplix (poplix papuasia org) (1 replies)
Re: an anternative to port-knoking using the OpenBSD pf only Jan 24 2006 09:56AM
Joachim Schipper (j schipper math uu nl) (1 replies)


 

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