Sun Microsystems Sun Fire V40z - Manual (Page 55)

Appendix A Preconfiguring Your Network to Support PXE Installation 49
Disabling the Firewall
If you enabled firewall security when you installed Red Hat Enterprise Linux
software on the system that will be your PXE server, complete the following steps to
disable the firewall so that PXE clients can download from the server.
Note – When you disable the firewall protection on the system that is your PXE
server, the security of the data on that server cannot be assured. If this server is
networked outside of your local intranet, be sure to re-enable the firewall after
downloading software to PXE clients.
1. Stop the ipchains service by typing the following command:
# service ipchains stop
2. Stop the iptables service by typing the following command:
# service iptables stop
3. Stop the ipchains service from starting when you restart the server by typing the
following command:
# chkconfig ipchains off
4. Stop the iptables service from starting when you restart the server by typing the
following command:
# chkconfig iptables off
Note – You might encounter error messages if the ipchains service is not installed
on the server. You can safely ignore these messages.
Installing Red Hat Linux From the Network
1. Reboot the server when you have finished all of the configuration steps.
2. Refer to “Installing Red Hat Enterprise Linux 3 Software From a Network” on
page 7 for instructions on completing the PXE installation.