From owner-freebsd-stable Sun Sep 2 10:42: 9 2001 Delivered-To: freebsd-stable@freebsd.org Received: from mail5.nc.rr.com (fe5.southeast.rr.com [24.93.67.52]) by hub.freebsd.org (Postfix) with ESMTP id A71CE37B403 for ; Sun, 2 Sep 2001 10:42:05 -0700 (PDT) Received: from i8k.babbleon.org ([66.57.85.154]) by mail5.nc.rr.com with Microsoft SMTPSVC(5.5.1877.687.68); Sun, 2 Sep 2001 13:41:59 -0400 Content-Type: text/plain; charset="iso-8859-1" From: Brian T.Schellenberger To: klein brock , freebsd-stable@FreeBSD.ORG Subject: Re: DOS prevent ? Date: Sun, 2 Sep 2001 13:41:57 -0400 X-Mailer: KMail [version 1.2] References: <20010902061950.38285.qmail@web20108.mail.yahoo.com> In-Reply-To: <20010902061950.38285.qmail@web20108.mail.yahoo.com> MIME-Version: 1.0 Message-Id: <01090213415700.00598@i8k.babbleon.org> Content-Transfer-Encoding: 8bit Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Sunday 02 September 2001 02:19, klein brock wrote: > Hi, > > does anybody know how to prevent DOS ? i was DOSed and > down for 1 day... can somebody help me ? - You need more details - This isn't really a "stable" issue; I'd use questions. - If you are personally be DOSed, in the sense that your ports are being flooded, then just shut off all services. Of course, if you are running a server, this isn't feasible. But if you can just go into inet and shut everything down and shut down all other internet daemons, there's nothing to flood; if that's too drastic, stop services at the firewall to all except those you intend to serve. If you are really running an internet server, then it's really hard. You can set up filters that reject packets from the same location "too close" to each other, but at some point the time to analyze the packtes and figure out that you should reject them can be flooded, too, so ultimately, against a sufficiently strong DOS, you are SOL. > > Thank you > > __________________________________________________ > Do You Yahoo!? > Get email alerts & NEW webcam video instant messaging with Yahoo! Messenger > http://im.yahoo.com > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-stable" in the body of the message -- Brian T. Schellenberger . . . . . . . bts@wnt.sas.com (work) Brian, the man from Babble-On . . . . bts@babbleon.org (personal) --------------------> Free Dmitry Sklyarov! <------------------------- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message