Mac OS X Automount resvport Option
  • Symptom: Mac OS NFS client cannot to connect to Linux NFS server, show error message like "Operation is not permitted.."
  • Reason: If the Linux NFS server exports with secure option, it means it will only listed to requests coming from ports 1-1024 on the client, so that a malicious non-root user on the client cannot come along and open up a spoofed NFS dialogue on a non-reserved port.
  • Solution: add resvport option on the Mac OS X client. for example:
    • nfsserver -detaults,resvport nfsserver:/exports/data
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