A couple of RHEL5 books I'm reading at the moment suggest port numbers above 1024 for statd, lockd, mountd and rquotad (eg 38001-38006 or 32764-32767) when configuring NFS to work with a firewall. The default /etc/sysconfig/nfs on CentOS5 however has defaults under 1024, such as mountd 892 statd 662 rquotad 875 Is there something security-related going on here that I'm not aware of, or some other explanation? Neither text mentions the use of ports under 1024 at all. Thanks Mick