CA Unified Infrastructure Management, previously known as Nimsoft, is a powerful IT monitoring solution that allows for management of numerous servers across a Nimsoft domain. This solution communicates using a closed source protocol known as “nimbus”. The complexity of a Nimsoft domain can be high, but the basic idea is to deploy Robots (the software agent) on all of the servers you want to be part of the Nimsoft domain in order to remotely manage them.
more here..........http://blog.gdssecurity.com/labs/2015/3/16/nimbus-protocol-enumeration-with-nmap.html
more here..........http://blog.gdssecurity.com/labs/2015/3/16/nimbus-protocol-enumeration-with-nmap.html