Supported OS

FreeBSD
FreeBSD 9.x (amd64) has not been supported since LANBilling 2.0.22
FreeBSD 10.x (amd64) has been supported since LANBilling 2.0.17.1
FreeBSD 11.x (amd64) has been supported since 24.11.2017
CentOS
CentOS 5.x (x86_64) has not been supported since LANBilling 2.0.22
CentOS 6.x (x86_64) has been supported since 2.0.04
CentOS 7.x (x86_64) has been supported since 2.0.13
Debian
Debian 6 Squeeze (amd64) has not been supported since LANBilling 2.0.14.5, 2.0.17.1, 2.0.18
Debian 7 Wheeze (amd64) has been supported since LANBilling 2.0.13
Debian 8 Jessie (amd64) has been supported since LANBilling 2.0.18
Debian 9 Stretch (amd64) Soon
Not supported 
End of support 
Supported 
Coming soon