Ansible Roles

Required roles

Common
- Installs several required packages and software updates, then reboots if necessary
- Configures network interfaces, and enables packet forwarding on them
VPN
- Installs strongSwan, enables AppArmor, limits CPU and memory access, and drops user privileges
- Builds a Certificate Authority (CA) with easy-rsa-ipsec and creates one client certificate per user
- Bundles the appropriate certificates into Apple mobileconfig profiles for each user
- Configures IPtables to block traffic that might pose a risk to VPN users, such as SMB/CIFS

Security Enhancements
- Enables unattended-upgrades to ensure available patches are always applied
- Modify features like core dumps, kernel parameters, and SUID binaries to limit possible attacks
- Enhances SSH with modern ciphers and seccomp, and restricts access to old or unwanted features like X11 forwarding and SFTP
DNS-based Adblocking
- Install the dnsmasq local resolver with a blacklist for advertising domains
- Constrains dnsmasq with AppArmor and cgroups CPU and memory limitations
DNS encryption
- Install dnscrypt-proxy
- Constrains dingo with AppArmor and cgroups CPU and memory limitations
SSH Tunneling
- Adds a restricted algo group with no shell access and limited SSH forwarding options
- Creates one limited, local account per user and an SSH public key for each