Security Basics mailing list archives
RE: Reflexive firewalls?
From: <benoni.martin () accenture com>
Date: Fri, 28 Dec 2007 00:51:49 +0100
Hi ! This seem to be port-knocking, but in a very simple way ! Check out tools as cd00r, SAd00r, doorman, CÖK, pasmal, fwknop, ... And yep, it is feasible with iptables, but you will need a small script (perl/sh/...) to open the ssh port after the telnet knock ... HTH ! -----Original Message----- From: listbounce () securityfocus com [mailto:listbounce () securityfocus com] On Behalf Of Danilo Chilene Sent: jeudi 27 décembre 2007 19:03 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:
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 Att, This message is for the designated recipient only and may contain privileged, proprietary, or otherwise private information. If you have received it in error, please notify the sender immediately and delete the original. Any other use of the email by you is prohibited.
Current thread:
- Reflexive firewalls? Ong Chin Kiat (Dec 27)
- Re: Reflexive firewalls? Danilo Chilene (Dec 27)
- RE: Reflexive firewalls? Tom Corelis (Dec 27)
- Re: Reflexive firewalls? 0x90 (Dec 27)
- RE: Reflexive firewalls? benoni.martin (Dec 28)
- Re: Reflexive firewalls? korozion (Dec 28)
- Re: Reflexive firewalls? Ansgar -59cobalt- Wiechers (Dec 27)
- RE: Reflexive firewalls? Weir, Jason (Dec 28)
- Re: Reflexive firewalls? Nick Owen (Dec 28)
- <Possible follow-ups>
- RE:Reflexive firewalls? securitylists (Dec 27)
- RE: Reflexive firewalls? Jason M. Beauford (Dec 28)
- Re: Reflexive firewalls? nobledark (Dec 28)
- RE: Reflexive firewalls? krymson (Dec 28)
- Re: Reflexive firewalls? Danilo Chilene (Dec 27)