VPN Load Tester is a tool to perform load testing on IPFire's OpenVPN server.
By using KVM and Libvirt in a CentOS 6 server, it is able to create a large number of virtual VPN clients and connect those client machines to the VPN server at the same time.
It is able to control all VPN clients to perform the same tasks on the VPN server. For example, it is able to control all VPN clients to send network traffic to the VPN server at the same time.