OpenSnitch is a GNU/Linux port of the Little Snitch firewall
Share a VPN connection with VMs or containers
Anti Spam SMTP Gateway
OpenWRT ©VMWare ©ESXi Appliance NAT router
One of the most advanced DNS Proxy and DNS Firewall in one product.
pfck - pf check - organizes flow information by host
Jateway is a general purpose TCP/IP connection proxy