From owner-freebsd-net Mon Oct 21 1:33:26 2002 Delivered-To: freebsd-net@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id A9BCE37B401 for ; Mon, 21 Oct 2002 01:33:25 -0700 (PDT) Received: from gvr.gvr.org (gvr.gvr.org [212.61.40.17]) by mx1.FreeBSD.org (Postfix) with ESMTP id CD18343E65 for ; Mon, 21 Oct 2002 01:33:24 -0700 (PDT) (envelope-from guido@gvr.org) Received: by gvr.gvr.org (Postfix, from userid 657) id 81EE897; Mon, 21 Oct 2002 10:33:23 +0200 (CEST) Date: Mon, 21 Oct 2002 10:33:23 +0200 From: Guido van Rooij To: Lars Eggert Cc: Charles Henrich , freebsd-net@freebsd.org Subject: Re: IPSEC/NAT issues Message-ID: <20021021083323.GA27359@gvr.gvr.org> References: <20021017162243.B89519@sigbus.com> <3DAF509C.6030002@isi.edu> <20021017172905.A91625@sigbus.com> <3DAF5C21.6000108@isi.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3DAF5C21.6000108@isi.edu> Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org On Thu, Oct 17, 2002 at 05:56:01PM -0700, Lars Eggert wrote: > > Your packets don't seem to reach natd after IPsec inbound processing. > > Looks like ipfw processing happens before IPsec (so natd sees the > IPsec'ed packets, but doesn't know anything about them), and gets thems > them after IPsec inbound processing. What you want is a way to do IPsec > first, and then ipfw processing, but I don't know if that can be done. > > Try configuring an IPIP tunnel between B and C, and transport-mode IPsec > that. That way, your NAT packets get tunneled, and the tunneled packets > secured. On inbound, security processing comes first, then > decapsulation, then ipfw. Only with the following patch: http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/netinet/ip_input.c.diff?r1=1.213&r2=1.214 -Guido To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message