From owner-freebsd-questions@FreeBSD.ORG Sun Sep 7 12:45:38 2003 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id B9D8B16A4BF for ; Sun, 7 Sep 2003 12:45:38 -0700 (PDT) Received: from mta10.adelphia.net (mta10.adelphia.net [68.168.78.202]) by mx1.FreeBSD.org (Postfix) with ESMTP id C545443FD7 for ; Sun, 7 Sep 2003 12:45:37 -0700 (PDT) (envelope-from fbsd_user@a1poweruser.com) Received: from barbish ([68.169.105.49]) by mta10.adelphia.net (InterMail vM.5.01.05.32 201-253-122-126-132-20030307) with SMTP id <20030907194538.NPK12180.mta10.adelphia.net@barbish>; Sun, 7 Sep 2003 15:45:38 -0400 From: "fbsd_user" To: "Guilmot Mike" , "Alex Zivenko" , Date: Sun, 7 Sep 2003 15:45:35 -0400 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="koi8-r" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.6604 (9.0.2911.0) In-Reply-To: <002201c37543$49d01c60$0100a8c0@guilmot2cimcs9> X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 Importance: Normal Subject: RE: Spoofing, defense? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: fbsd_user@a1poweruser.com List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 07 Sep 2003 19:45:38 -0000 I have not read anything about using this "#RFC 1918 private IP" in IPFILTER rule set. Is this a valid phrase? -----Original Message----- From: owner-freebsd-questions@freebsd.org [mailto:owner-freebsd-questions@freebsd.org]On Behalf Of Guilmot Mike Sent: Sunday, September 07, 2003 9:24 AM To: Alex Zivenko; freebsd-questions@freebsd.org Subject: Re: Spoofing, defense? Alex Zivenko wrote: > Everybody know what is spoofing. > How can I protect my server from it? It's a router to the internet, > but some of my friends spoof the address and go thrue the router. > Firewall can't protect. > Any suggestions? Follow an ipf howto/tutorial. There are MANY of them around. In my firewall I prevent it like: # Anti-spoof, no loggin [ I hate reading them ;-) ] block in quick on rl0 from 192.168.0.0/16 to any #RFC 1918 private IP block in quick on rl0 from 172.16.0.0/12 to any #RFC 1918 private IP block in quick on rl0 from 10.0.0.0/8 to any #RFC 1918 private IP block in quick on rl0 from 127.0.0.0/8 to any #loopback block in quick on rl0 from 0.0.0.0/8 to any #loopback block in quick on rl0 from 169.254.0.0/16 to any #DHCP auto-config block in quick on rl0 from 192.0.2.0/24 to any #reserved for doc's block in quick on rl0 from 204.152.64.0/23 to any #Sun cluster interconnect block in quick on rl0 from 224.0.0.0/3 to any #Class D & E multicast Hope this was what you meant ... Kind regards, Guilmot Mike _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org"