Advanced settings for Shares

I’d like some more advanced per-share configurations settings. For example if I could enable/disable AFS/CIFS/NFS individually per share. Or to make use of some protocol features like limiting the hosts that can see an NFS share. I don’t see nything like that in the UI. Since it’s runnuing Debian linux I know I can get it configured fom the root ssh access, but would that put me in the realm of the warranty-voiding notice when enabling SSH access?

Yes, modifying the NAS using SSH will void your warranty.