Re: [PATCH] xtables-addons: match packets based on status of grsecurity RBAC

["Anthony G. Basile" <basile@opensource.dyc.edu>]

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On 10/18/2010 05:50 AM, Jan Engelhardt wrote:
> On Sunday 2010-10-17 15:52, basile@opensource.dyc.edu wrote:
> 
>> This patch adds a module which is useful to users of
>> grsecurity's RBAC system.  It matches packets based
>> on whether RBAC is enabled or disabled.
> 
> Can you elaborate a bit on how this is useful in conjunction with 
> rulesets? I could imagine it be used with LSM selctx'es for example, or 
> another extension that tests for other RBAC attributes.

The idea here is that when the RBAC rulesets are not being enforced, the
system is more vulnerable and the user wants stricter firewall rules.
When RBAC is being enforced, one can relax the firewall and access to
services which are now better protected.  In practice this usually means
allowing only access to some trusted IP(s) on boot before RBAC is turned on.

> 
> Also, I don't see a xt_gradm.c in this patch.
> 

This is part of the grsecurity patch which not only adds the xtable code
but also the RBAC code.  Without the entire RBAC stuff, xt_gradm doesn't
make sense and so it is included with the grsecurity patch to the kernel
and not this patch to xtables-addons.

See: http://grsecurity.net/download_stable.php

> 
> thanks,
> Jan
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- -- 
Anthony G. Basile, Ph. D.
Chair of Information Technology
D'Youville College
Buffalo, NY 14201
(716) 829-8197
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