From: Ryan Daly <daly@ctcgsc.org>
To: Julio Cesar Ody <julioody@bol.com.br>, netfilter@lists.netfilter.org
Subject: Re: making services invisible
Date: 10 Oct 2002 09:25:28 -0400 [thread overview]
Message-ID: <1034256328.549.41.camel@linux13.ctcgsc.org> (raw)
In-Reply-To: <3DA57D10.8040904@bol.com.br>
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Use DROP instead of REJECT.
REJECT action tells tables to send back an ICMP message indicating that
you're REJECTing the packet. DROPing will just DROP with no further
action.
--
On Thu, 2002-10-10 at 09:13, 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
However, when I perform a stealth scan using nmap on my host, I still
can see them running, but instead of "opened" I get them as "filtered".
Is there a way to block these results, making the services literally
invisible ? Appreciate any help, and also any technical information
(links, docs) regarding the answer.
Julio Cesar Ody
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next prev parent reply other threads:[~2002-10-10 13:25 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 [this message]
2002-10-10 13:46 ` Eric Leblond
2002-10-10 14:41 ` Leonardo Rodrigues ( listas )
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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