Irregular Expressions

May 21 2010   12:26PM GMT

Biba explained – Part 3



Posted by: Dan O'Connor
Tags:
biba
FreeBSD biba

Now we can put some context around biba running on a FreeBSD system and some things you could do with it.

There is 65,535 levels that can be assigned to a process or file, with 3 special levels.

low – It is lower than any other process.

equal – It is equal it any other process, it’s almost like excluding it from the label system.

high – higher than any other process.

There is also something called compartments that can be applied to the label, so a file can have a level and a compartment. There is a max of 256 compartments ( 0 – 255 ) , processes and files can be part of multiple compartments and it can get a bit confusing if you don’t plan it out well.

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