21.6.3. Running NFS Behind a Firewall
Because NFS requires portmap, which dynamically assigns ports for RPC services and can cause problems for configuring firewall rules, you can edit the
/etc/sysconfig/nfsconfiguration file to control which ports the required RPC services run on. Refer to and read Section 32.1.23, “
/etc/sysconfig/nfs” for instructions on how to configure a firewall to allow NFS.