Re: port knocking - use closed ports for authentication
From: Fondula di Carceri (fondula.di.carceri_at_gmx.net)
Date: 05/15/03
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Date: Thu, 15 May 2003 07:55:39 GMT
> port knocking is a novel method of using closed ports for user
> authentication
> http://mkweb.bcgsc.bc.ca/portknocking/
> the method allows remote users, in possession of a secret, to manipulate
> firewall rules to open ports thereby allowing connections into a
completely
> isolated networked host; the method can be extended to transfer arbitrary
> information across closed ports
> this approach to securing networked hosts is described in the current
issue
> of Sys Admin Magazine
> http://www.samag.com/current/
I've been doing this for over a year now for ssh and ftp... can't believe
this is something new..
you only need some creativity, a flexible packet filter and an homebrewed
ids :)
Sincerely,
Fondula di Carceri
[ fondula dot di dot carceri at gmx dot net . gpg or pgp on request ]
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