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
24.63%

Hypervisors

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

VMware
45.79%
KVM
26.10%
Microsoft
15.13%
Xen
9.71%
VirtualBox
2.44%
Unknown
0.83%