((better)): Xxx Netgr

Her blood chilled. That netgroup granted root-equivalent access to any machine trusting shadow.oldnet —for her, for Kaelen, and for a user named root from any host. But the xxx meant the machine field was wildcarded. Someone—long ago—had hardcoded a universal skeleton key.

I'm assuming you meant to type "XFS Netgroup" or a similar topic. However, I'll provide a general report on "NIS Netgroup" or "Unix Netgroup" as it seems related.

: Specialized switches for Audio-over-IP, used in professional stadium or concert setups.