# apt-get install nfs-common nfs-kernel-server portmap
# vim /etc/default/nfs-common
STATDOPTS="--port 32765 --outgoing-port 32766"
# vim /etc/default/nfs-kernel-server
RPCMOUNTDOPTS="-p 32767"
# vim /etc/default/quota
RPCRQUOTADOPTS="-p 32769"
# vim /etc/modprobe.d/nfs.conf 
options lockd nlm_udpport=32768 nlm_tcpport=32768
options nfs callback_tcpport=32764
# shutdown -r now

Règles Iptables :

-A INPUT -i eth0 -p tcp -m state --state NEW -m multiport --dports 111,2049,32764:32769 -j ACCEPT
-A INPUT -i eth0 -p udp -m state --state NEW -m multiport --dports 111,2049,32764:32769 -j ACCEPT