Rhel BootLoader, Single-user mode password & Interactive Boot in a Cloud environment
Posted on 2014-10-22
We run cloud service & our vCenter is not accessible to our tenants
and their IT support; so I would say console access is not feasible
unless the tenant/customer IT come to our DC.
If the following 3 hardenings are done our tenant/customer RHEL
Linux VM, what's the impact to the tenant's sysadmin & IT operation?
a) CIS 1.5.3 Set Boot Loader Password :
if this password is set, when tenant reboot (shutdown -r)
their VM each time, will it prompt for the bootloader
password at console? If so, is there any way the tenant,
could still get their VM booted up if they have no access
to vCenter's console?
b) CIS 1.5.4 Require Authentication for Single-User Mode :
Does Linux allow ssh access while in single-user mode &
can this 'single-user mode password' be entered via an
ssh session (without access to console), assuming certain
'terminal' service is started up / running while in single
c) CIS 1.5.5 Disable Interactive Boot :
what's the general consensus on this? Disable or enable?
Our corporate hardening guide does not mention this item.
So if the tenant wishes to boot up step by step (ie pausing
at each startup script), they can't do it?
Feel free to add any other impacts that anyone can think of
Lastly, how do people out there grant console access to their
tenants in Cloud environment without security compromise
(I mean without granting vCenter access) : I heard that we can
customize vCenter in a modular way to grant limited access of
vCenter to each tenants, is this so & any link that describes this?