From owner-freebsd-questions@FreeBSD.ORG Thu Oct 7 20:07:49 2004 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id B88F616A4CE for ; Thu, 7 Oct 2004 20:07:49 +0000 (GMT) Received: from pi.codefab.com (pi.codefab.com [199.103.21.227]) by mx1.FreeBSD.org (Postfix) with ESMTP id 6AB7C43D4C for ; Thu, 7 Oct 2004 20:07:49 +0000 (GMT) (envelope-from cswiger@mac.com) Received: from [192.168.1.3] (pool-68-160-246-51.ny325.east.verizon.net [68.160.246.51]) by pi.codefab.com (8.12.11/8.12.11) with ESMTP id i97K7VU1029567 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Thu, 7 Oct 2004 16:07:33 -0400 (EDT) Message-ID: <4165A1FF.5080906@mac.com> Date: Thu, 07 Oct 2004 16:07:27 -0400 From: Chuck Swiger Organization: The Courts of Chaos User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.3) Gecko/20040910 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Norm Vilmer References: <416595F3.1030601@etherealconsulting.com> In-Reply-To: <416595F3.1030601@etherealconsulting.com> X-Enigmail-Version: 0.86.1.0 X-Enigmail-Supports: pgp-inline, pgp-mime Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Status: No, hits=0.0 required=5.5 tests=none autolearn=no version=2.63 X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on pi.codefab.com cc: freebsd-questions@freebsd.org Subject: Re: nmap'ing myself X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 07 Oct 2004 20:07:49 -0000 Norm Vilmer wrote: [ ... ] > My question is: from a "well" configured firewall, "Should" I be able to > nmap the public interface using a console session on the firewall > itself? Sure. nmap should return close to zero open ports. > Will allowing this compromising security of the machine? nmap doesn't compromise the security of your machine. Having open ports connected to vulnerable services is the primary security risk. > Basically, should I even attempt to make this work? What is "this"? > What's a good way to test your own firewall without driving down > the road (and hacking into an unsecured linksys wireless router.... > just kidding)? Put another machine on the subnet of your external interface, and do an nmap scan from there. That represents what your ISP would see, or a bad guy who compromised the ISP possibly up through the DSL modem you have. -- -Chuck