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Re: [PATCH] bridge: make bridge-nf-call-*tables default configurable

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From: Herbert Xu <herbert@...>
To: Jan Engelhardt <jengelh@...>
Cc: David Miller <davem@...>, <markmc@...>, <netdev@...>, <kaber@...>, <netfilter-devel@...>
Subject: Re: [PATCH] bridge: make bridge-nf-call-*tables default configurable
Date: Wednesday, July 1, 2009 - 12:10 am

On Wed, Jul 01, 2009 at 05:50:18AM +0200, Jan Engelhardt wrote:

Good point.  We really should make these risks much more explicit.

However, I still think the risk with bridging is higher, especially
in the presence of virtualisation.  Consider the scenario where you
have to VMs on the one host, each with a dedicated bridge with the
intention that neither should know anything about the other's
traffic.

With conntrack running as part of bridging, the traffic can now
cross over which is a serious security hole.

Cheers,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@gondor.apana.org.au>
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Messages in current thread:
[PATCH] bridge: make bridge-nf-call-*tables default configur..., Mark McLoughlin, (Tue Jun 30, 12:27 pm)
Re: [PATCH] bridge: make bridge-nf-call-*tables default conf..., Patrick McHardy, (Wed Jul 1, 4:56 am)
Re: [PATCH] bridge: make bridge-nf-call-*tables default conf..., David Miller, (Tue Jun 30, 11:16 pm)
Re: [PATCH] bridge: make bridge-nf-call-*tables default conf..., Mark McLoughlin, (Wed Jul 1, 6:45 am)
Re: [PATCH] bridge: make bridge-nf-call-*tables default conf..., David Miller, (Wed Jul 1, 12:02 pm)
Re: [PATCH] bridge: make bridge-nf-call-*tables default conf..., Herbert Xu, (Wed Jul 1, 12:26 pm)
Re: [PATCH] bridge: make bridge-nf-call-*tables default conf..., Patrick McHardy, (Wed Jul 1, 6:51 am)
Re: [PATCH] bridge: make bridge-nf-call-*tables default conf..., David Miller, (Wed Jul 1, 12:02 pm)
Re: [PATCH] bridge: make bridge-nf-call-*tables default conf..., Patrick McHardy, (Wed Jul 1, 12:05 pm)
Re: [PATCH] bridge: make bridge-nf-call-*tables default conf..., Mark Smith, (Wed Jul 1, 5:18 pm)
Re: [PATCH] bridge: make bridge-nf-call-*tables default conf..., David Miller, (Wed Jul 1, 12:08 pm)
Re: [PATCH] bridge: make bridge-nf-call-*tables default conf..., Herbert Xu, (Tue Jun 30, 1:00 pm)
Re: [PATCH] bridge: make bridge-nf-call-*tables default conf..., Patrick McHardy, (Wed Jul 1, 4:57 am)
Re: [PATCH] bridge: make bridge-nf-call-*tables default conf..., Herbert Xu, (Wed Jul 1, 5:07 am)
Re: [PATCH] bridge: make bridge-nf-call-*tables default conf..., Patrick McHardy, (Wed Jul 1, 5:21 am)
Re: [PATCH] bridge: make bridge-nf-call-*tables default conf..., Herbert Xu, (Wed Jul 1, 12:33 pm)
Re: [PATCH] bridge: make bridge-nf-call-*tables default conf..., Patrick McHardy, (Wed Jul 1, 1:01 pm)
Re: [PATCH] bridge: make bridge-nf-call-*tables default conf..., David Miller, (Tue Jun 30, 3:06 pm)
Re: [PATCH] bridge: make bridge-nf-call-*tables default conf..., Jan Engelhardt, (Tue Jun 30, 4:16 pm)
Re: [PATCH] bridge: make bridge-nf-call-*tables default conf..., Herbert Xu, (Tue Jun 30, 9:15 pm)
Re: [PATCH] bridge: make bridge-nf-call-*tables default conf..., Patrick McHardy, (Wed Jul 1, 5:01 am)
Re: [PATCH] bridge: make bridge-nf-call-*tables default conf..., Jan Engelhardt, (Tue Jun 30, 11:50 pm)
Re: [PATCH] bridge: make bridge-nf-call-*tables default conf..., Ben Greear, (Wed Jul 1, 12:14 am)
Re: [PATCH] bridge: make bridge-nf-call-*tables default conf..., Herbert Xu, (Wed Jul 1, 12:10 am)
Re: [PATCH] bridge: make bridge-nf-call-*tables default conf..., Mark Smith, (Tue Jun 30, 4:57 pm)
Re: [PATCH] bridge: make bridge-nf-call-*tables default conf..., Herbert Xu, (Tue Jun 30, 9:48 pm)
Re: [PATCH] bridge: make bridge-nf-call-*tables default conf..., Jan Engelhardt, (Tue Jun 30, 5:30 pm)