From: Thomas Graf <tgraf@suug.ch>
To: David Miller <davem@davemloft.net>
Cc: hpa@zytor.com, netdev@vger.kernel.org
Subject: Re: ProxyARP and IPSec
Date: Thu, 24 Aug 2006 12:50:37 +0200 [thread overview]
Message-ID: <20060824105037.GL3470@postel.suug.ch> (raw)
In-Reply-To: <20060823.151424.78711856.davem@davemloft.net>
* David Miller <davem@davemloft.net> 2006-08-23 15:14
> From: Thomas Graf <tgraf@suug.ch>
> Date: Wed, 23 Aug 2006 21:14:25 +0200
>
> > * H. Peter Anvin <hpa@zytor.com> 2006-08-22 17:31
> > > Specifically, Linux will not ProxyARP for an address unless it has a
> > > route for it, *and* that route either has a DNAT marking or points to a
> > > different interface than the input interface:
> >
> > I can think of a very ugly way: Use netfilter to match on the
> > arp packet prerouting, set nfmark to some value, create a routing
> > rule matching the fwmark again, have it look up a separate table
> > with a dummy route pointing to a dummy device. Make sure to have
> > a proxy neighbour entry as using the device proxy_arp sysctl would
> > fail again.
>
> This shows we have a usability problem if that's the only way
> to do this :-)
What about adding blackhole device to be used for such routes.
I believe it would be good architecture to always use devices
to state directions packets are being received from and sent to.
next prev parent reply other threads:[~2006-08-24 10:50 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-23 0:31 ProxyARP and IPSec H. Peter Anvin
2006-08-23 19:14 ` Thomas Graf
2006-08-23 22:14 ` David Miller
2006-08-23 23:18 ` Alexey Kuznetsov
2006-08-24 1:12 ` H. Peter Anvin
2006-08-24 1:14 ` H. Peter Anvin
2006-08-24 2:20 ` Andy Gay
2006-08-24 4:14 ` H. Peter Anvin
2006-08-24 12:50 ` Alexey Kuznetsov
2006-08-26 4:16 ` H. Peter Anvin
2006-09-02 15:36 ` Stephen J. Bevan
2006-09-02 17:30 ` H. Peter Anvin
2006-09-02 20:54 ` Stephen J. Bevan
2006-09-05 5:17 ` H. Peter Anvin
2006-09-04 22:27 ` Alexey Kuznetsov
2006-09-05 5:12 ` H. Peter Anvin
2006-09-05 9:05 ` Alexey Kuznetsov
2006-09-22 20:36 ` David Miller
2006-09-23 4:22 ` Stephen J. Bevan
2006-09-06 2:25 ` Stephen J. Bevan
2006-08-24 10:50 ` Thomas Graf [this message]
2006-09-07 22:28 ` H. Peter Anvin
2006-09-08 7:37 ` Thomas Graf
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