The Keyserver is Undo's license-key server, responsible for giving out 'seats' from an enterprise-wide UDB license.
Obtaining the Keyserver
Before installing the Keyserver, Undo needs to be provided with the MAC address, hostname and port number of the machine where the Keyserver will be installed. Undo will then the generate a license that will tie the Keyserver to working on that particular machine.
Once the license has been generated, you can download the Keyserver as part of the Live Recorder release, under the keyserver/ folder.
Installing the Keyserver
Undo provides Keyserver installation instructions for both systemd and init.d., in the keyserver/README file.