From owner-freebsd-security Fri Nov 3 13:28:29 2000 Delivered-To: freebsd-security@freebsd.org Received: from jamus.xpert.com (jamus.xpert.com [199.203.132.17]) by hub.freebsd.org (Postfix) with ESMTP id 7108537B4CF for ; Fri, 3 Nov 2000 13:28:19 -0800 (PST) Received: from roman (helo=localhost) by jamus.xpert.com with local-esmtp (Exim 3.12 #5) id 13roLb-0008WN-00; Fri, 03 Nov 2000 23:26:03 +0200 Date: Fri, 3 Nov 2000 23:26:03 +0200 (IST) From: Roman Shterenzon To: Buliwyf McGraw Cc: security@FreeBSD.ORG Subject: Re: Console Message II In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-security@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Thu, 2 Nov 2000, Buliwyf McGraw wrote: > > In this moment i am using ipf in the box which is showing de message: > "icmp-response bandwidth limit". > It doesnt happen all time, just some days for a few > When the message appears, the "System Load" grows to 5 or more, until > the server crash! > My question is: > > If i put this line in my "ipf rules" file: > block in proto icmp all > > What kind of problems could i get for this restriction??? > I think that there was some bug which was fixed long time ago, what version of FreeBSD are you running? Check the advisories. Obviously someone is icmp-flooding you. Blocking all icmp can hurt you badly.. --Roman Shterenzon, UNIX System Administrator and Consultant [ Xpert UNIX Systems Ltd., Herzlia, Israel. Tel: +972-9-9522361 ] To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message