[CentOS] /etc/exports file and any machine mount

I used to have an exports file like the following on redhat 7.3... the would allow any machine to mount the /home/CentOS.iso directory.

/var/spool/lpd (rw) /etc/silentm slave(ro,secure,no_all_squash,no_root_squash) /home/CentOS.iso (ro,secure,no_all_squash,no_root_squash)

This does not seem to work on centos 4.2. I have to explicitly have a machine name like: /home/CentOS.iso machine(ro,secure,no_all_squash,no_root_squash)

for it to mount.

I have been looking at the nfs man page and dont see why this is not working still.

How do I let any machine mount the /home/CentOS.iso directory.

Thanks,

Jerry