Date: 15 Jul 2002 16:25:36 +0200 From: Dag-Erling Smorgrav <des@ofug.org> To: "Dmitry S. Rzhavin" <dima@rt.ru> Cc: security@FreeBSD.ORG Subject: Re: ipfw and keep-state Message-ID: <xzp1ya583vj.fsf@flood.ping.uio.no> In-Reply-To: <3D32D849.E3D8F2BE@rt.ru> References: <3D32D849.E3D8F2BE@rt.ru>
next in thread | previous in thread | raw e-mail | index | archive | help
"Dmitry S. Rzhavin" <dima@rt.ru> writes: > 10 pass tcp from any to ip2 in keep-state setup > ... nothing interesting here > 20 deny tcp from any to ip2 > > > Or, in other words, I want to pre-auth some packet with rile 10 to > check it later. Then, I decide to drop it. > But ipfw creates dynamic rule "inet <-> ip1" and passes this > session. I think this is not good. Why does ipfw works this way? That's what you asked it to do. Rule 10 basically says "if the packet is a tcp SYN packet destined for ip2, stop examining it, let it through, and remember to let all similar packets through in the future" DES -- Dag-Erling Smorgrav - des@ofug.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?xzp1ya583vj.fsf>