From owner-freebsd-net Thu Oct 18 7:48:36 2001 Delivered-To: freebsd-net@freebsd.org Received: from pintail.mail.pas.earthlink.net (pintail.mail.pas.earthlink.net [207.217.120.122]) by hub.freebsd.org (Postfix) with ESMTP id 7E49F37B407; Thu, 18 Oct 2001 07:48:33 -0700 (PDT) Received: from mindspring.com (dialup-209.247.141.141.Dial1.SanJose1.Level3.net [209.247.141.141]) by pintail.mail.pas.earthlink.net (EL-8_9_3_3/8.9.3) with ESMTP id HAA02475; Thu, 18 Oct 2001 07:48:09 -0700 (PDT) Message-ID: <3BCEEBDD.46121235@mindspring.com> Date: Thu, 18 Oct 2001 07:49:01 -0700 From: Terry Lambert Reply-To: tlambert2@mindspring.com X-Mailer: Mozilla 4.7 [en]C-CCK-MCD {Sony} (Win98; U) X-Accept-Language: en MIME-Version: 1.0 To: "Jose M. Alcaide" , Beech Rintoul , current@FreeBSD.org, net@FreeBSD.org Subject: Re: arp: is using my IP address 0.0.0.0! ??!?!? References: <20011018065526.F3D4DC8@nebula.anchoragerescue.org> <20011018115929.C921@v-ger.we.lc.ehu.es> <3BCEE9AD.6839DF3E@mindspring.com> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org To expand a little... > That said, it's probably a good idea to never ARP for 0.0.0.0, > since a "who has" in that case is a really dumb idea, since, > as weas pointed out, it's intended to mean "this host", in the > absence of an IP address (i.e. 0.0.0.0 is not an IP address, > it's a special value meaning "not an IP address"). It's probably also a good idea to make interfaces who have an IP of 0.0.0.0 _not_ respond to ARP requests for that address, and, just in case there are other idiots, we should also not give proxy ARP responses for that address, etiher. Ghah. I hate special cases... -- Terry To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message