Security is an absolute need. However, it can be taken too far.
Hardening is very huge topic to discuss.
Usually hardening means closing down everything useless or not needed.
When it comes to system hardening there are mainly these type of hardenings.
Systems hardening demands a methodical approach to audit, identify, close, and control potential security vulnerabilities throughout your organization.There are several types of system hardening activities, including:
Application hardening
Operating system hardening
Server hardening
Database hardening
Network hardening
As you can see network hardenings is one the type of system hardening.
- using servers file to control which machine can operate backups
- making sure that only admin users from specific hosts (like NMC and backup server/media server hosts are listed) and all others if needed are added as per demand (and removed)
- you said you run latest NW, but there are 3 different trees of latest code so that means pretty much nothing as 8.1.x with some newer modules does enhance security even further - that's not to say that you should use latest and greatest right away (think of Windows)
- if you wish to isolate view of users on access list (if this is your case), you can logically partition backup server application and assign views (I believe that is present as of NW8)
- probably if using nsrauth, you can make your security officer wet by saying you use RSA encryption for key exchange and authentification and get rid of him/her in rather fast manner.
This is my understanding of your questions.
Feel free to comment if you have any doubt and please upvote if you like my answer that helps me to improve.
Thank you.
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