From: "Leonardo Rodrigues ( listas )" <leolistas@solucoesip.net>
To: Eric Leblond <eleblond@init-sys.com>, netfilter@lists.netfilter.org
Subject: Re: making services invisible
Date: Thu, 10 Oct 2002 11:41:32 -0300 [thread overview]
Message-ID: <003001c2706b$20982a50$3201a8c0@leonardo> (raw)
In-Reply-To: 1034257577.1589.2.camel@tech004
DROP would make nmap ( or any other scanner ) mark that port as filtered
too. To make services closed and 'invisible' to scanners, you should use '-j
REJECT --reject-with tcp-reset'.
Sincerily,
Leonardo Rodrigues
----- Original Message -----
From: "Eric Leblond" <eleblond@init-sys.com>
To: <netfilter@lists.netfilter.org>
Sent: Thursday, October 10, 2002 10:46 AM
Subject: Re: making services invisible
On Thu, 2002-10-10 at 15:13, Julio Cesar Ody wrote:
> Hello. I'm using Slackware 8.1, kernel 2.4.18 and iptables v1.2.7a. I
> blocked external acess to some services using the following rule:
>
> iptables -A INPUT -i ! eth0 -p tcp -m multiport --destination-port
> <port1>,<port2>,<blablabla> -j REJECT
Use DROP not REJECT, with REJECT you send an ICMP message, so it's
filtered, not close
next prev parent reply other threads:[~2002-10-10 14:41 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-10-10 13:13 making services invisible Julio Cesar Ody
2002-10-10 13:25 ` Ryan Daly
2002-10-10 13:46 ` Eric Leblond
2002-10-10 14:41 ` Leonardo Rodrigues ( listas ) [this message]
2002-10-11 16:54 ` Nick Drage
2002-10-12 15:57 ` How will stop follwoing service Sundaram Ramasamy
2002-10-10 14:24 ` making services invisible Kevin Dwyer
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