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Re: Linux Security *Module* Framework (Was: LSM conversion to static interface)
From: Jan Engelhardt <jengelh_at_nospam>Date: Wed Oct 24 2007 - 20:46:58 GMT
To: Crispin Cowan <crispin@crispincowan.com>
On Oct 24 2007 13:18, Crispin Cowan wrote:
>Jan Engelhardt wrote:
>> On Oct 24 2007 19:11, Simon Arlott wrote:
>>
>>> * (I've got a list of access rules which are scanned in order until one of
>>> them matches, and an array of one bit for every port for per-port default
>>> allow/deny - although the latter could be removed.
>>> http://svn.lp0.eu/simon/portac/trunk/)
>>>
>> Besides the 'feature' of inhibiting port binding,
>> is not this task of blocking connections something for a firewall?
>>
>So now you are criticizing his module. Arguing about the merits of
>security semantics. This is exactly why Linus wanted LSM, so we don't
>have to have these kinds of discussions, at least not on LKML :)
This was a question. I was perfectly aware that iptables alone does not prohibit binding, and there are reasons to inhibit binding.
But sometimes, a coder does not know where to start - chances are,
that someone else wanting to do bind(2) inhibiting is doing it
with a syscall table change. Or coder did not notice that a firewall
is sufficient for the task to be achieved (which is not always the
case - hence the question).
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