Rahul Sundaram wrote:
Mike McCarty wrote: If he runs behind ahardware firewall, and has all ports closed or "stealthed", then he's as secure as one can be and still have connections.SELinux is not related to any traditional firewalls at all just in case someone is confused about that still.
Agreed on this point. I hope what I wrote wouldn't cause anyone to think otherwise. [snip]
Until such time, efficacy in loading or not loading SELinux to achieve enhanced security is a matter of conjecture, opinion, and personal preference.It is very much not conjecture. Use any good search engine and do your own research rather speculate. One point that should be noted is that
You mean like these security vulnerabilities introduced by SELinux: http://www.nsa.gov/selinux/list-archive/0306/4468.cfm http://nvd.nist.gov/nvd.cfm?cvename=CVE-2006-1052 http://www.gentoo.org/security/en/glsa/glsa-200510-22.xml http://marc.info/?l=selinux&m=105492305125090&w=2 http://osvdb.org/displayvuln.php?osvdb_id=25232 It appears that SELinux can be disabled via a kernel exploit in FC6: http://lists.immunitysec.com/pipermail/dailydave/2007-March/004133.html For another "supporter" whose comments can actually be read as a criticism, see http://lwn.net/Articles/111437/ Here's an example of a defect added to the kernel as a result of attempting to accomodate SELinux http://projects.info-pull.com/mokb/MOKB-14-11-2006.html
unlike the original analogy SELinux is a additional security layer and turning it off doesnt not equate to turning off all security measures
Also agreed that it is an additional security measure, though I wouldn't use the term "layer".
and of course the management of SELinux needs and will improve with the continuous development of better user space tools but what the underlying architecture is based on decades of research and work. NSA SELinux site has various docs on this.
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