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Re: Reflexive firewalls?
From: <nobledark () hushmail com>
Date: Fri, 28 Dec 2007 09:03:00 -0500

Sounds a bit like "port-knocking" or the newer version, "Single 
Packet Auth" (SPA). There is a app called fwknop that does this - 
google for the site, I don't have it in front of me right now.

 - Nd

On Thu, 27 Dec 2007 13:02:55 -0500 Danilo Chilene 
<dchilene () impsat com> wrote:
I know how do this with PF.

Don't have any idea with iptables. :(

Ong Chin Kiat wrote:
Hi list,

I've recently used an SSH server that had an interesting
authentication mechanism. You first had to telnet to the machine 
on a
certain port. After doing this (it will just time out - no 
prompt),
you then SSH to the server in question. The telnet step has to 
be
carried out, if not SSH will just time out.

My question is, is this called reflexive firewalling, and can I
duplicate this with iptables?

Thanks.

-- 
Danilo F. Chilene

Especialista SO

Global Crossing Limited

Tel.: (55 11) 3957-2945

Cel.: (55 11) 8231-1851

danilo.chilene () globalcrossing com


www.globalcrossing.com




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