IPFire is running very well in a virtual environment.

See this chart to get a clue about how many machines are running virtually.

Virtualised systems
24.17%

Hypervisors

This is a list of all hypervisor vendors that IPFire is running on.

VMware
44.93%
KVM
26.25%
Microsoft
15.67%
Xen
10.00%
VirtualBox
2.47%
Unknown
0.68%