hardened.mdwn

[[!meta title="Hardened OS"]]

grsecurity
----------

Basic install:

    sudo apt-get -t jessie-backports install linux-image-4.9.0-2-grsec-amd64 linux-image-grsec-amd64
    sudo apt-get install paxtest
    sudo usermod -aG grsec-tpe `whoami`

As root:

    echo "kernel.grsecurity.rwxmap_logging = 0" > /etc/sysctl.d/kernel.grsecurity.rwxmap_logging.conf 
    echo "kernel.grsecurity.grsec_lock = 1"     > /etc/sysctl.d/kernel.grsecurity.grsec_lock.conf

As regular user, after reboot:

    paxctl -cm /usr/bin/git-annex
    paxctl -cm /usr/bin/qemu-img
    paxctl -cm /usr/bin/qemu-system-x86_64

References
----------

* https://micahflee.com/2016/01/debian-grsecurity/
* https://nixaid.com/grsec-in-docker/
* https://hardenedlinux.github.io/