nfsd/portmapper and iptables on Linux 4

[Ben Ransom]

I've just put up a Redhat 4 system (call it nfsServer) and am unable to nfs 
mount file systems from it on other machines ...unless I turn off iptables 
on nfsServer.

I think the problem is the client is unable to see portmapper on 
nfsServer.  In the past I've opened udp ports 111 and 2049 in iptables but 
this doesn't do the trick with the Redhat4 box.  Note, I had SELinux turned 
on but have disabled it for now.

Any suggestions?
Thanks,
-Ben