From owner-freebsd-questions@FreeBSD.ORG Mon Dec 15 13:23:46 2003 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 E200B16A4CE for ; Mon, 15 Dec 2003 13:23:46 -0800 (PST) Received: from be-well.no-ip.com (lowellg.ne.client2.attbi.com [66.30.200.37]) by mx1.FreeBSD.org (Postfix) with ESMTP id AD6F343D1F for ; Mon, 15 Dec 2003 13:23:45 -0800 (PST) (envelope-from freebsd-questions-local@be-well.ilk.org) Received: by be-well.no-ip.com (Postfix, from userid 1147) id 567BA55; Mon, 15 Dec 2003 16:23:45 -0500 (EST) Sender: lowell@be-well.ilk.org To: =?Windows-1251?B?zOj46uA=?= References: <1635567875.20031214202657@inbox.ru> From: Lowell Gilbert Date: 15 Dec 2003 16:23:45 -0500 In-Reply-To: <1635567875.20031214202657@inbox.ru> Message-ID: <44he01n5b2.fsf@be-well.ilk.org> Lines: 26 User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.3 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii cc: questions@FreeBSD.org Subject: Re: trouble: ipnat & simultaneously icmp traffic from many NATed computers X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: questions@FreeBSD.org List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 15 Dec 2003 21:23:47 -0000 =?Windows-1251?B?zOj46uA=?= writes: > What is this? How can I configure FreeBSD to ping remote_host > simultaneously from any count of NATed computers? We really need do > this! (We are small ISP, and have monitor programs that monitor some our > equipment by icmp ping command and connect to some it services. > Now when we NAT our office LAN we cannot simultaneously monitor our > equipment from many point!) When the ping response comes back from your remote_host, the only identifying information on where to send it is the destination address. If you have more than one host behind a NAT sharing the same external address, then there's no way to distinguish between simultaneous outstanding ping requests from different internal hosts. The only way for this to work is to give the machines different external addresses (which may not be the same as the internal ones). > Once again sorry for my bad english.... Your message was quite easy to understand. -- Lowell Gilbert, embedded/networking software engineer, Boston area: resume/CV at http://be-well.ilk.org:8088/~lowell/resume/ username/password "public"