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Re: Reflexive firewalls?
From: korozion <korozion () koroded net>
Date: Thu, 27 Dec 2007 17:27:45 -0500

I believe this is a basic form of Port Knocking, and there are ways to do it with IPTables. portknocking.org might be a place to start.

Danilo Chilene 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.



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