Depending on the installed operation system and based on the regular publicized security advisories the available security patches are on the maintained system recorded during the agreed time frame, once a month. Depending on size and importance of your services, a multi-level update procedure in a test- and productive surrounding is offered: available updates are first rolled out on a test surrounding. After your acceptance an roll out on the production will follow. Any update problems can be recognised in early stage without impairment on the productive system.