Why can't I NFS-mount from a Linux box?

Frequently Asked Questions for FreeBSD 2.X : Networking : Why can't I NFS-mount from a Linux box?
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10.7. Why can't I NFS-mount from a Linux box?

Some versions of the Linux NFS code only accept mount requests from a priviledged port; try

            mount -o -P linuxbox:/blah /mnt

Frequently Asked Questions for FreeBSD 2.X : Networking : Why can't I NFS-mount from a Linux box?
Previous: I'm having problems with NFS to/from FreeBSD and my Wuffotronics Workstation / generic NFS appliance, where should I look first?
Next: Why can't I NFS-mount from a Sun box?