After failing the last time I did some more research on how to get the security manager enabled.
Lukily I found some discussion about this issue on a mailinglist.
I resolved this issue at least with the equinox framework. The Felix didn’t work yet. I will do some more in depth research on this later on.

Now how do we get this SecurityManager running with the Equinox OSGi Container?
We need another parameter specialized for Equinox. So we end up with a custom.properties file that has the following entries:

karaf.framework=equinox

org.osgi.framework.security=osgi


The critical entries are set in the system.properties

java.security.policy=${karaf.base}/etc/all.policy

One thing beforehand, calling system.exit from a bundle is evil!
But even worse is a third party legacy jar calling system.exit instead of throwing exceptions. Now how do we stop this jar from doing such evil?
The only way you can do this is to use a SecurityManager preventing calls to system.exit. Wow!!!
Now how am I supposed to do something like that in an OSGi world?
This is where the security bundle of felix comes in place.