Date: Tue, 11 Dec 2001 11:17:49 -0300 (ART) From: Fernando Gleiser <fgleiser@cactus.fi.uba.ar> To: krzysztof <cs052279@yahoo.com> Cc: <freebsd-questions@FreeBSD.ORG> Subject: Re: IPF Firewall Question Message-ID: <20011211111314.R93662-100000@cactus.fi.uba.ar> In-Reply-To: <20011211140850.14764.qmail@web14801.mail.yahoo.com>
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On Tue, 11 Dec 2001, krzysztof wrote: > Hello, > > Are there any security concerns about passing in > icmp traffic to my network? I do not use NAT so > people at best will be able to map out live machines > on my network. Is this correct, or should I be > concerned about possible attacks through ICMP? The > only ICMP traffic I pass in is icmp-type 0,8, & 11. If you let icmp echo to your broadcast address. your network can act as a "smurf amplifier". See http://www.cert.org/advisories/CA-1998-01.html for details. Fer > Any pointers are greatly appreciated. > > Thank You > Chris > > > __________________________________________________ > Do You Yahoo!? > Check out Yahoo! Shopping and Yahoo! Auctions for all of > your unique holiday gifts! Buy at http://shopping.yahoo.com > or bid at http://auctions.yahoo.com > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-questions" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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