Date: Thu, 15 Nov 2001 02:00:07 -0800 (PST) From: "Crist J. Clark" <cristjc@earthlink.net> To: freebsd-bugs@FreeBSD.org Subject: Re: kern/31891: Change mask of loopback net breaks compatibility with older versions Message-ID: <200111151000.fAFA07111605@freefall.freebsd.org>
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The following reply was made to PR kern/31891; it has been noted by GNATS. From: "Crist J. Clark" <cristjc@earthlink.net> To: .@babolo.ru Cc: FreeBSD-gnats-submit@FreeBSD.ORG Subject: Re: kern/31891: Change mask of loopback net breaks compatibility with older versions Date: Thu, 15 Nov 2001 01:58:48 -0800 On Sat, Nov 10, 2001 at 07:11:26AM +0300, .@babolo.ru wrote: [snip] > >Description: > > There was 4.2 RELEASE, where packets with 127.0.0.0/24 source address > droped on input interfaces. Now it changed to 127.0.0.0/8, > which is incombatible with old configuration. > This net - 127.0.0.0/8 is extremly useful > as private net in clustering environment, > so I propose configuration variable MYLOOP_MASKLEN, > with default meaning that conforms RFC1122 > > >How-To-Repeat: > > Try P2P addresses in 127.0.0.0/8 net. This is a feature, not a bug. See RFC1122, "Requirements for Internet Hosts," (g) { 127, <any> } Internal host loopback address. Addresses of this form MUST NOT appear outside a host. The 127/8 is never valid when coming from another host. Do not use 127/8 as a private network, that's what RFC1918 addresses are for. -- Crist J. Clark | cjclark@alum.mit.edu | cjclark@jhu.edu http://people.freebsd.org/~cjc/ | cjc@freebsd.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message
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