Re: NetLabel

[Paul Moore <paul.moore@hp.com>]

On Wednesday 04 June 2008 3:05:08 pm Justin Mattock wrote:
> On Wed, Jun 4, 2008 at 2:31 PM, Paul Moore <paul.moore@hp.com> 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
>
> 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;

Sound like a good plan.  I wish I had some decent documentation to pass 
along but I haven't had a chance to write anything up so far ... 
regardless, if you have any questions don't hesitate to ask.

Good luck.

-- 
paul moore
linux @ hp

--
This message was distributed to subscribers of the selinux mailing list.
If you no longer wish to subscribe, send mail to majordomo@tycho.nsa.gov with
the words "unsubscribe selinux" without quotes as the message.