Date: Fri, 18 Jan 2002 01:30:02 -0800 (PST) From: "Crist J . Clark" <cjc@FreeBSD.ORG> To: freebsd-bugs@FreeBSD.org Subject: Re: misc/33996: 127.0.0.0/8 not added to routing table by default Message-ID: <200201180930.g0I9U2x31695@freefall.freebsd.org>
next in thread | raw e-mail | index | archive | help
The following reply was made to PR misc/33996; it has been noted by GNATS.
From: "Crist J . Clark" <cjc@FreeBSD.ORG>
To: Ruslan Ermilov <ru@FreeBSD.ORG>
Cc: bug-followup@FreeBSD.ORG
Subject: Re: misc/33996: 127.0.0.0/8 not added to routing table by default
Date: Fri, 18 Jan 2002 01:22:34 -0800
On Thu, Jan 17, 2002 at 08:30:02AM -0800, Ruslan Ermilov wrote:
> The following reply was made to PR misc/33996; it has been noted by GNATS.
>
> From: Ruslan Ermilov <ru@FreeBSD.org>
> To: Aragon Gouveia <aragon@phat.za.net>
> Cc: bug-followup@FreeBSD.org
> Subject: Re: misc/33996: 127.0.0.0/8 not added to routing table by default
> Date: Thu, 17 Jan 2002 18:20:01 +0200
>
> On Thu, Jan 17, 2002 at 08:02:01AM -0800, Aragon Gouveia wrote:
> >
> >
> > The reserved 127.0.0.0/8 range is not added to FreeBSD's routing
> > table with destination interface lo0 by default. Instead, only
> > 127.0.0.1/32 is being routed to the loopback interface. Pinging,
> > for example, 127.2.3.4 returns no response - in my case it tries
> > to route via the default route out onto the net!
> >
> Nah, this is something that should be controlled with a firewall.
> The default ipfw(8) rules block this. Also, the kernel function
> in_canforward() does not allow forwarding of IP packets with the
> destination address in the 127.0.0.0/8 range.
>
> Can this PR be closed now?
Well, there is a bug here. Have you ever actually tried,
# ping 127.2.3.4
And sniffed the wire? That is a Bad Thing. No machine should ever let
127/8 on the wire. But I believe there is another PR on this.
--
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
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200201180930.g0I9U2x31695>