Date: Thu, 18 Oct 2001 11:59:29 +0200 From: "Jose M. Alcaide" <jose@we.lc.ehu.es> To: Beech Rintoul <akbeech@anchoragerescue.org> Cc: current@FreeBSD.org, net@FreeBSD.org Subject: Re: arp: <some ether addr> is using my IP address 0.0.0.0! ??!?!? Message-ID: <20011018115929.C921@v-ger.we.lc.ehu.es> In-Reply-To: <20011018065526.F3D4DC8@nebula.anchoragerescue.org>; from akbeech@anchoragerescue.org on Wed, Oct 17, 2001 at 10:55:25PM -0800 References: <Pine.BSF.4.21.0110171211230.65297-100000@InterJet.elischer.org> <20011018065526.F3D4DC8@nebula.anchoragerescue.org>
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On Wed, Oct 17, 2001 at 10:55:25PM -0800, Beech Rintoul wrote: > On Wed, 17 Oct 2001, Jose M. Alcaide wrote: > > After rebuilding the kernel two days ago (Oct 15), I am getting lots of > > messages like these: > > > > arp: 00:30:65:de:99:32 is using my IP address 0.0.0.0! > > arp: 00:0a:27:b0:a7:06 is using my IP address 0.0.0.0! > > arp: 00:30:65:d1:2f:cc is using my IP address 0.0.0.0! > > arp: 00:30:65:e9:57:5e is using my IP address 0.0.0.0! > > > > and so on. > > > > Neither ifconfig(8) nor arp(8) show anything unusual. > > > > I'm having the exact same problem. I connect to a large subnet /12 and I'm > getting flooded with these. This just started about a week ago. I'm also not > using DHCP. Any way of blocking this short of turning off all kernel messages? I found something interesting: these messages are caused by ARP requests carrying 0.0.0.0 as the sender IP address. All of them come from Apple Macintosh (over 40 different machines). I am not sure whether 0.0.0.0 is a legal sender IP address in an ARP request; 0.0.0.0 means "this" host, so that I think that it is a valid address when the machine doing the ARP request does not know its IP address yet (though this sounds stupid). Anyway, the fact is that -CURRENT can flood the console and /var/log/messages if there are many Macintosh sending these ARP requests in a LAN (as it is our case). I think that there is no reason to printf these messages, since 0.0.0.0 is a valid IP address meaning "this" host. -- ****** Jose M. Alcaide // jose@we.lc.ehu.es // jmas@FreeBSD.org ****** ** "Beware of Programmers who carry screwdrivers" -- Leonard Brandwein ** To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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