From owner-freebsd-security Sun Jul 22 11: 8: 3 2001 Delivered-To: freebsd-security@freebsd.org Received: from falcon.mail.pas.earthlink.net (falcon.mail.pas.earthlink.net [207.217.120.74]) by hub.freebsd.org (Postfix) with ESMTP id EE88637B405 for ; Sun, 22 Jul 2001 11:07:58 -0700 (PDT) (envelope-from cjc@earthlink.net) Received: from blossom.cjclark.org (dialup-209.247.142.113.Dial1.SanJose1.Level3.net [209.247.142.113]) by falcon.mail.pas.earthlink.net (EL-8_9_3_3/8.9.3) with ESMTP id LAA10501; Sun, 22 Jul 2001 11:07:57 -0700 (PDT) Received: (from cjc@localhost) by blossom.cjclark.org (8.11.4/8.11.3) id f6MI7tX00831; Sun, 22 Jul 2001 11:07:55 -0700 (PDT) (envelope-from cjc) Date: Sun, 22 Jul 2001 11:07:55 -0700 From: "Crist J. Clark" To: serkoon Cc: freebsd-security@FreeBSD.ORG Subject: Re: rpc.statd attacks Message-ID: <20010722110755.B323@blossom.cjclark.org> Reply-To: cjclark@alum.mit.edu References: <002e01c1129c$5b0ef6b0$0200000a@kilmarnock> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <002e01c1129c$5b0ef6b0$0200000a@kilmarnock>; from serkoon@thedarkside.nl on Sun, Jul 22, 2001 at 12:52:08PM +0200 Sender: owner-freebsd-security@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org On Sun, Jul 22, 2001 at 12:52:08PM +0200, serkoon wrote: > > However, since I have port 111 blocked in the firewall, > > how in the world is even an error message being generated? > > I have even portscanned and 111 is not open to the outside. > > Firewall UDP:111 or kill portmapd (if you don't need it). 1) You do not allow traffic to 111/tcp OR 111/udp, do you? 2) Just because you block port 111 doesn't mean people cannot attack rpc.statd. Blocking 111 just makes finding the ports that rpc.statd is listening on a little harder, but not difficult. Don't "block" port 111. Pass only traffic you want and expect, block everything else by default. -- Crist J. Clark cjclark@alum.mit.edu To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message