HP Cluster Platform Introduction v2010 Installation Manual page 37

For more information on configuring and troubleshooting IB network connections, see
the documentation at:
http://www.docs.hp.com/en/highperfcomp.html.
Click Next.
f. Configure your firewall settings. Typically, you select the defaults. Public is firewalled,
private is not. We recommend you do not firewall your private network.
4.3 Installing HPCS from CD 37