Etc/nfs.conf
From OS X Scientific Computing
Here is an example where I changed some defaults to reserve ports and turn off bonjour: (Don't slavishly copy this -- I changed the port numbers randomly).
nfs.server.bonjour 0 nfs.server.tcp 1 nfs.server.udp 0 nfs.server.port 5321 nfs.lockd.port 654 nfs.server.mount.port 584 nfs.server.rquota.port 317 nfs.statd.port 577

