Date: Sat, 2 Feb 2002 10:52:18 -0800 From: "Crist J. Clark" <cristjc@earthlink.net> To: "Bruce A. Mah" <bmah@FreeBSD.org>, Giorgos Keramidas <keramida@ceid.upatras.gr>, Stefan `Sec` Zehl <sec@42.org>, Ruslan Ermilov <ru@FreeBSD.org>, cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/netinet ip_output.c Message-ID: <20020202105218.D1280@gohan.cjclark.org> In-Reply-To: <20020202171403.GA6272@pst.org>; from pst@pst.org on Sat, Feb 02, 2002 at 09:14:03AM -0800 References: <200202011042.g11Ag9U93410@freefall.freebsd.org> <20020202123007.GA19270@matrix.42.org> <20020202140147.GA71238@hades.hell.gr> <20020202164938.GA5777@pst.org> <200202021654.g12GswL03156@bmah.dyndns.org> <20020202171403.GA6272@pst.org>
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On Sat, Feb 02, 2002 at 09:14:03AM -0800, Paul Traina wrote:
> On Sat, Feb 02, 2002 at 08:54:58AM -0800, Bruce A. Mah wrote:
> > If memory serves me right, Paul Traina wrote:
> > > Please don't hard-code this. We've seen some people actually use the
> > > loopback network as their internal (to their AS) network. Loopback
> > > means different things to different people. It's the same thing as
> > > the firewall stuff.
> >
> > It looks pretty hard-coded in RFC 1122. Are you saying FreeBSD should
> > continue to ignore this part of the Host Requirements document?
>
> Yes. I am.
>
> a) 1122 is plagued with controversy. I came along to the IETF shortly
> after it was written, shelved, re-written, and finally published as
> "well, it's better than nothing." We didn't like it then, and it
> would be a mistake to elevate it to holy scripture now.
>
> b) FreeBSD itself cannot know where the chassis boundary is. Consider
> devices that have multiple IP entities inside one skin.
If each entity is a host, it must conform to the standards.
> c) Many machines don't use 127.0.0.1 as their loopback address (consider
> Cisco routers), so some network providers used network 127 as a private
> OAM or backbone network.
All of the *BSD's unconditionally drop 127/8 coming in to the host in
ip_input.c. If you cannot receive on that network, it was broken
already.
--
Crist J. Clark | cjclark@alum.mit.edu
| cjclark@jhu.edu
http://people.freebsd.org/~cjc/ | cjc@freebsd.org
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