Ensure that maintenance of all configurations, installations and operations are done securely

Ensure that maintenance of all configurations, installations and operations are done securely.
a) Perform management operations in trusted channels. Consider i) installing trusted TLS certificates, ideally issued internally, in as many administrator interfaces as possible, see 2.7.1. and 2.7.2. And ii) avoid exposing administrator interfaces to the internet and to the servers/clients using the service. b) Use trusted and dedicated clients for management operations. c) Reduce interactive log-ins directly on servers and clients to a minimum when performing management operations. Interactive log-in increases the risk (attacks such as “pass the hash”) and goes against the goal of automating and standardising configuration, and also against the goal of automated verification of the configuration.