mailing list archives
RE: Reflexive firewalls?
From: "Jason M. Beauford" <jbeauford () subropartners com>
Date: Thu, 27 Dec 2007 14:22:19 -0500
Port triggering, or Port Knocking.
heres the first url I found:
Multiple-port knocking Netfilter/IPtables only implementation
From: Tom Corelis [mailto:tomc () targetbilling com]
Sent: Thursday, December 27, 2007 12:41 PM
To: security-basics () securityfocus com
Subject: RE: Reflexive firewalls?
Would this be called port triggering? I've seen a few commercial router
boxes that support that feature, though I've never looked into it
From: listbounce () securityfocus com [mailto:listbounce () securityfocus com]
On Behalf Of Danilo Chilene
Sent: Thursday, December 27, 2007 10:03 AM
To: Ong Chin Kiat
Cc: security-basics () securityfocus com
Subject: Re: Reflexive firewalls?
I know how do this with PF.
Don't have any idea with iptables. :(
Ong Chin Kiat wrote:
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?
Danilo F. Chilene
Global Crossing Limited
Tel.: (55 11) 3957-2945
Cel.: (55 11) 8231-1851
danilo.chilene () globalcrossing com