OpenSnitch is a GNU/Linux port of the Little Snitch firewall
Serve as a reverse proxy to protect your web services from attacks
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
Personal firewall for linux desktop and android phone