From owner-freebsd-security Thu Mar 22 12:32:26 2001 Delivered-To: freebsd-security@freebsd.org Received: from salseiros.melim.com.br (salseiros.melim.com.br [200.215.110.23]) by hub.freebsd.org (Postfix) with ESMTP id C24C537B762 for ; Thu, 22 Mar 2001 12:32:15 -0800 (PST) (envelope-from ronan@melim.com.br) Received: from fazendinha (fazendinha.melim.com.br [192.168.168.42]) by salseiros.melim.com.br (8.9.3/8.9.3) with SMTP id RAA44975 for ; Thu, 22 Mar 2001 17:24:59 -0300 (EST) (envelope-from ronan@melim.com.br) Message-ID: <003d01c0b30f$35aebfa0$2aa8a8c0@melim.com.br> From: "Ronan Lucio" To: Subject: Re: DoS attack - advice needed Date: Thu, 22 Mar 2001 17:32:26 -0300 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4133.2400 Sender: owner-freebsd-security@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org > Chris Byrnes wrote: > > > > > >> type 3 is required for TCP/UDP traffic > > > > > > CB> Hrm. > > > > > > I'm sorry. But what means 'Hrm'? It seems I don't know English good > > > enough :( > > > > I think we can move this thread to personal e-mail, because some people > > are getting offended that I don't want ICMP traffic. > > ;-) ICMP filtering is bad for everyone who accesses your > website, as it can cause malfunction. One of the typical problems > is the "freezing" of the http connections when you are viewing a > webpage. The problem? The "ICMP need fragment" messages are > not reaching your web server. If I add a rules: ipfw add pass icmp from any to my.ip.adress icmptypes 3 ipfw add deny icmp from any to mu.ip.adress Will it resolve the problem of fragmented packets? Ronan Lucio To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message