Rocks Cluster NAT

The NAT was not enabled on the cluster to allow nodes access to the public network. This was achieved by editing the /etc/sysconfig/iptables with vim and adding the following lines:-

*nat
-A POSTROUTING -o eth1 -j MASQUERADE
COMMIT

to the beginning of the file.

Save the file using wq

Then restart the service using:-

/sbin/service iptables restart

Then sync the config using :-

rocks sync config

That is now the NAT working and allowing internet access from the compute nodes on the private network.