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RBAC policy
pyllyukko edited this page Nov 16, 2016
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- Start off with the example policy provided with
gradm
- Decide what is sensitive and put that into
$grsec_denied
- First create the basic role layout
- Create a
domain
for all regular users - Configure the default role with
/ h
,-CAP_ALL
,connect disabled
&bind disabled
- Create a
- Use policy inheritance as much as possible to keep the policy file small and manageable
- Restrict all capabilities by default
- Start fixing the policy by functionality, e.g. fix login, Xorg, audio, networking, cron, suspend, bluetooth, etc...
- Double-check policy tweaks from a separate reference policy created with full system learning
- Use inheritance for those problematic subjects that call stuff from everywhere (
/usr/lib64/pm-utils/bin/pm-action
is one example)