Any modifications made to the virtual appliance: including the hardening of the OS or Installation of 3rd party tools/agents may lead to system instability and conditions unforeseen when the system was developed and subsequently QA-ed by SoftNASBuurst.
SoftNAS Buurst has worked diligently to create a virtual appliance that is both functional and secure. The software objects contained within our appliance are highly modified, bespoke and/or not necessarily what one would experience with a generic install of a Linux OS. As such, SoftNAS Buurst does not recommend, nor support the modification of our SoftNAS virtual appliance image (as stated when logging in via SSH to any SoftNAS Virtual Appliance node).
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If unsure about the best approach to take, please do not hesitate to contact SoftNAS Buurst for guidance.