Summary of all statements and requirements of the BSI for secure remote maintenance
"Remote maintenance access is a necessary evil in the automation network, which usually opens up several potential gateways for attackers and malware. It is therefore understandable that operators are looking for suitable standards and best practices that offer a kind of guideline for secure remote maintenance. The German Federal Office for Information Security (BSI) has published a document with requirements for the secure implementation of remote maintenance solutions in the industrial sector for precisely this purpose. The BSI is the central organization for recommending solutions in the field of IT security and has already published several publications on secure remote maintenance access in the past." - www.sichere-industrie.de