Re: NetLabel

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On Wed, Jun 4, 2008 at 2:31 PM, Paul Moore <paul.moore@xxxxxx> wrote:
> On Wednesday 04 June 2008 2:55:15 am Justin Mattock wrote:
>> Hello; Hopefully this is the right list to post this question,
>> after looking at  NetLabel, in dmesg I couldn't help but see:
>> [    0.570655] NetLabel: Initializing
>> [    0.570660] NetLabel:  domain hash size = 128
>> [    0.570663] NetLabel:  protocols = UNLABELED CIPSOv4
>> [    0.570730] NetLabel:  unlabeled traffic allowed by default
>>
>> "unlabeled traffic allowed by default."
>> is this similar to selinux (handle_unkown=deny, if so is there an
>> option to change this to "unlabeled traffic deny."
>
> Nope, the two are completely unrelated.  By default, NetLabel allows
> unlabeled traffic to pass (meaning the netlbl_skbuff_getattr() function
> returns an empty secattr and no error, the LSM does the actual packet
> pass/drop) so as to keep networking working for the majority of users
> who do not configure NetLabel.  If you were to disable unlabeled
> traffic using NetLabel only CIPSO and static/fallback (using 2.6.25 or
> greater) labeled traffic would be allowed into the system.
>
> Unless you really know what you are doing I wouldn't mess with this
> setting.
>
>> Also is there a location for this in the kernel i.g. /proc/sys/net/*
>> regards;
>
> There are some sysctl variables which offer control of the
> NetLabel/CIPSO functionality they do no toggle the unlabeled allow/deny
> behavior, for that you need the netlabel_tools package, specifically
> netlabelctl.
>
>  * http://netlabel.sf.net
>
> --
> paul moore
> linux @ hp
>

I'm going to answer honestly I don't know what I'm doing, so with that
in mind maybe I should just leave this for now,
I did have a look at the netlabel_tools package, but like what I said
in the first sentence, I need to really study this
before venturing into this, (that way I'm not stuck with no internet.)
regards;


-- 
Justin P. Mattock

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