"Authentication error" when mounting/accessing NFS share

Solution Verified - Updated -

Issue

  • Mounts from a NFS share are failing with mount: mount to NFS server 'X.X.X.X' failed: RPC Error: Authentication error.
  • Files can not be locked on a NFS share when mounted as NFSv3
  • System logs on the NFS client record rpcbind[XXXX]: connect from 127.0.0.1 to getport/addr(status): request from unauthorized host

Environment

  • Red Hat Enterprise Linux
  • NFSv3

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