From mboxrd@z Thu Jan  1 00:00:00 1970
From: "H. Peter Anvin" <hpa@zytor.com>
Subject: Re: autofs no_local_binds option (nfs <-> bind mounts)
Date: Tue, 13 Jan 2004 12:25:48 -0800
Sender: autofs-bounces@linux.kernel.org
Message-ID: <4004544C.7030904@zytor.com>
References: <200401131958.i0DJwlV0001078000@anw.zk3.dec.com>
	<40044F2A.9080305@zytor.com> <200401132023.49657.autofs@dylan.me.uk>
Mime-Version: 1.0
Content-Transfer-Encoding: 7bit
Return-path: <autofs-bounces@linux.kernel.org>
In-Reply-To: <200401132023.49657.autofs@dylan.me.uk>
List-Id: <autofs.vger.kernel.org>
List-Unsubscribe: <http://linux.kernel.org/mailman/listinfo/autofs>,
	<mailto:autofs-request@linux.kernel.org?subject=unsubscribe>
List-Archive: <http://linux.kernel.org/pipermail/autofs>
List-Post: <mailto:autofs@linux.kernel.org>
List-Help: <mailto:autofs-request@linux.kernel.org?subject=help>
List-Subscribe: <http://linux.kernel.org/mailman/listinfo/autofs>,
	<mailto:autofs-request@linux.kernel.org?subject=subscribe>
Errors-To: autofs-bounces@linux.kernel.org
Content-Type: text/plain; charset="us-ascii"
To: Dylan <autofs@dylan.me.uk>
Cc: autofs@linux.kernel.org, Eric Werme USG <werme@alpha.zk3.dec.com>

Dylan wrote:
> On Tuesday 13 January 2004 20:03 pm, H. Peter Anvin wrote:
> 
> 
>>However, this doesn't address the issue of the client being *the same
>>system*, in which case you can't just move the IP address away from
>>it, since local == remote; you can no longer send packets to the
>>server and get a response back.  You can do it if you can get the
>>client and the server sides to bind to *different* IP addresses, in
>>which case the current autofs behaviour will correctly see them as
>>being separate and mount NFS.
> 
> Would binding an alias address to the interface be sufficient?
> 

No, you have to force the local port to not be bound to the same
address.  I think this can be done with iptables rules, but I'm not
sure... I'm not a networking wizard.

	-hpa