From owner-freebsd-stable Sat May 27 5:52:15 2000 Delivered-To: freebsd-stable@freebsd.org Received: from mail2.anthologeek.net (day.anthologeek.net [212.43.217.20]) by hub.freebsd.org (Postfix) with ESMTP id 27F2E37B9F3 for ; Sat, 27 May 2000 05:52:12 -0700 (PDT) (envelope-from sw@anthologeek.net) Received: by mail2.anthologeek.net (Postfix, from userid 1000) id 9956017146; Sat, 27 May 2000 14:50:14 +0200 (CEST) Date: Sat, 27 May 2000 14:50:14 +0200 From: Sameh Ghane To: Sam Habash Cc: stable@freebsd.org Subject: Re: making 4.0 DOS resistant Message-ID: <20000527145013.C90356@anthologeek.net> References: <20000526231337.T86725@jade.chc-chimes.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2i In-Reply-To: ; from the@llama.com on Sat, May 27, 2000 at 05:35:24AM -0700 Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Le Sat, May 27, 2000 at 05:35:24AM -0700, Sam Habash ecrivit: > I wonder if anybody has incoroprated support for syncookies a la linux. /usr/src/sys/i386/conf/LINT: # ICMP_BANDLIM enables icmp error response bandwidth limiting. You # typically want this option as it will help protect the machine from # D.O.S. packet attacks. # options ICMP_BANDLIM You could also try: options TCP_DROP_SYNFIN #drop TCP packets with SYN+FIN options TCP_RESTRICT_RST #restrict emission of TCP RST if you run an IRC server or such a thing. -- Sameh. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message