By default ColorCert works in stand-alone mode on a PC or Mac workstation.
Alternatively, a ColorCert Repository Server or LAN/WAN can be accessed to download jobs and other information, this does require internet access.
An internet connection is also required to access PantoneLIVE data, or to update the ColorCert software.
Even if running in standalone mode an internet connection is required at least once every 30 days, to refresh the local cache.