From owner-freebsd-security Sun Jan 17 01:43:24 1999 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id BAA23450 for freebsd-security-outgoing; Sun, 17 Jan 1999 01:43:24 -0800 (PST) (envelope-from owner-freebsd-security@FreeBSD.ORG) Received: from hotmail.com (f52.hotmail.com [207.82.250.63]) by hub.freebsd.org (8.8.8/8.8.8) with SMTP id BAA23445 for ; Sun, 17 Jan 1999 01:43:23 -0800 (PST) (envelope-from madrapour@hotmail.com) Received: (qmail 20053 invoked by uid 0); 17 Jan 1999 09:43:20 -0000 Message-ID: <19990117094320.20052.qmail@hotmail.com> Received: from 208.218.169.25 by www.hotmail.com with HTTP; Sun, 17 Jan 1999 01:43:20 PST X-Originating-IP: [208.218.169.25] From: "N. N.M" To: freebsd-security@FreeBSD.ORG Subject: Small Servers - ICMP Redirect Date: Sun, 17 Jan 1999 01:43:20 PST Mime-Version: 1.0 Content-Type: text/plain Sender: owner-freebsd-security@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org Hi, I have two security-related questions: 1) Might it be any problem in connectivity and services, if I block all traffic to (TCP/UDP) Small servers like echo, chargen, .... on firewall? 2) About ICMP redirect messages, as I learned they could be used to make our network disconnected and somthing. What's the way to prevent this kind of attack? Does blocking this kind of ICMP on firewall and routers cause any problem in connectivity and system behavior? Thanks in advance, Nazila N. ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message