Overview of common reasons as to why the NCM Lockbox keep getting locked
Environment
NCM 10.1.X
Resolution
NCM uses RSA lockbox which checks for Seven Stable System Values (SSVs) to whenever lockbox is accessed.
If 5 or more out of the 7 SSVs are same, then lockbox access is granted, otherwise the lockbox will lock.
These SSVs are RSA secret and they don't disclose these values. Below are a list of items that have possibility of changing the SSVs, in which causing the lockbox to lock. Changing any of the following could possibility lock the lockbox:
Hostname
OS upgrades
OS patches
New RPM packages
IP Address
Kernel parameters
Moving OS to a new host in Virtual Environment
Changing settings on the OS in a Virtual Environment
Please understand this information is based on various customer environments and no environment is the same. What might lock the lockbox on one customer's environment might not on another.