Date: Sun, 23 Sep 2001 20:21:01 -0400 From: Chris Faulhaber <jedgar@fxp.org> To: Juha Saarinen <juha@saarinen.org> Cc: 'Kevin Oberman' <oberman@es.net>, freebsd-stable@FreeBSD.ORG Subject: Re: loopback not working for anything other than 127.0.0.1 Message-ID: <20010923202101.A62163@peitho.fxp.org> In-Reply-To: <003401c14474$e4d53e40$0a01a8c0@den2> References: <200109232040.f8NKeoR13940@ptavv.es.net> <003401c14474$e4d53e40$0a01a8c0@den2>
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On Mon, Sep 24, 2001 at 09:15:38AM +1200, Juha Saarinen wrote:
> :: I don't think any RFC actually calls for this, but 1122 is probably
> :: the relevant reference. From 3.2.1.3:
> :: (g) { 127, <any> }
> ::=20
> :: Internal host loopback address. Addresses of this form
> :: MUST NOT appear outside a host.
>=20
> RFC 990 seems to cover it though:
>=20
> The class A network number 127 is assigned the "loopback"
> function, that is, a datagram sent by a higher level protocol
> to a network 127 address should loop back inside the host. No
> datagram "sent" to a network 127 address should ever appear on
> any network anywhere.
>=20
FYI, RFC 990 is obsolete, the current version is RFC 1700:
0990 Assigned numbers. J.K. Reynolds, J. Postel. Nov-01-1986. (Format:
TXT=3D174784 bytes) (Obsoletes RFC0960) (Obsoleted by RFC1010) (Updated
by RFC0997) (Status: US:) (Status: HISTORIC)
1010 Assigned numbers. J.K. Reynolds, J. Postel. May-01-1987. (Format:
TXT=3D78179 bytes) (Obsoletes RFC0990) (Obsoleted by RFC1060) (Status:
US:) (Status: HISTORIC)
1060 Assigned numbers. J.K. Reynolds, J. Postel. Mar-01-1990. (Format:
TXT=3D177923 bytes) (Obsoletes RFC1010) (Obsoleted by RFC1340) (Status:
US:) (Status: HISTORIC)
1340 Assigned Numbers. J. Reynolds, J. Postel. July 1992. (Format:
TXT=3D232974 bytes) (Obsoletes RFC1060) (Obsoleted by RFC1700) (Status:
US:) (Status: HISTORIC)
1700 Assigned Numbers. J. Reynolds, J. Postel. October 1994. (Format:
TXT=3D458860 bytes) (Obsoletes RFC1340) (Also STD0002) (Status: US:)
(Status: STANDARD)
--=20
Chris D. Faulhaber - jedgar@fxp.org - jedgar@FreeBSD.org
--------------------------------------------------------
FreeBSD: The Power To Serve - http://www.FreeBSD.org
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