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Setting up NFS v4.0 in RHEL/CentOS 6.x

After you've installed NFS v4.0 and its required dependencies in your CentOS server, there are only seven steps to configure it.

Server Instructions
1. Edit the file "/etc/exports" that's the access control list for serving directories of file systems to NFS clients:
/<directory>  <hostname or fqdn>(options) ...
/<directory>  <ip address>/<prefix length>(options) ... 

2. Change the default runlevels for the services used by your NFS server:
chkconfig --levels 35 nfs on;
chkconfig --levels 35 portmap on;

3. Automatically start each service on boot up:
update-rc.d portmap <options>;
update-rc.d nfs <options>;

4. Start each service used by your NFS server:
service portmap start;
service nfs start;

5. Edit the file "/etc/hosts.allow" that's the hosts access control list for allowing access to services on your server from specific hostnames, IP addresses, networks, and FQDNs:
<service or wildcard>: <hostname> <ip address>/<subnet mask> <fqdn>

6. Edit the file "/etc/hosts.deny" that's the hosts access control list for denying access to services on your server from specific hostnames, IP addresses, networks, and FQDNs:
<service or wildcard>: <hostname> <ip address>/<subnet mask> <fqdn>

7. Allow incoming and outgoing client connections to your NFS server through your firewall:
iptables -A INPUT -i <interface> -p tcp --dport 2049 -j ACCEPT
iptables -A OUTPUT -o <interface> -p tcp --sport 2049 -j ACCEPT

Try connecting to the remote NFS share you set up.

Client Instructions
1. Edit the file "/etc/fstab" that automatically mounts partitions, file systems, and NFS shares:
<server>:/  /<directory>  nfs4  <option>=<value>,<option>=<value>,...

2. Allow outgoing client connections to your NFS server through your firewall:
iptables -A INPUT -i <interface> -p tcp --sport 2049 -j ACCEPT
iptables -A OUTPUT -o <interface> -p tcp --dport 2049 -j ACCEPT

Do you have a suggestion about how to improve this blog? Let's talk about it. Contact me at David.Brenner.Jr@Gmail.com or 720-584-5229.

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