As an it-enthusiast and founder/CEO of mxben GmbH in Frankfurt/M., I successfully rely on the combination of open source and commercial security & privacy solutions. We use a couple of IPFire appliances (bare metal/virtual) from the beginning in 2013 and I guess myself to be experienced in vpn technology and interoperation of IPFIRE with devices from vendors like ZyXel, AVM, Ubiquiti, HPE/aruba.

As confessing fan of IPFIRE we monthly donate a small amount to the project and I highly encourage others to do so as well