Change NFS default ports

Hello friends,
please advice me how to change

 nfs lockd_tcpport,lockd_udpport,mountd_port,rquotad_port.statd_port,statd_outgoing_port default ports 

in to different ports.
is it in /etc/default/nfs ?

thanks!

You can try to change ports in /etc/services (and apply to all services i.e. reboot).
The idea sounds a bit insane though...