Installation guide

68 Chapter 3. Boot Process, Init, and Shutdown
3.7.1.16. /etc/sysconfig/iptables
Like /etc/sysconfig/ipchains, the /etc/sysconfig/iptables file stores information used
by the kernel to set up packet filtering services at boot time or whenever the service is started.
You should not modify this file by hand unless you are familiar with how to construct iptables
rules. The simplest way to add rules is to use the /usr/sbin/lokkit command or the gnome-
lokkit graphical application to create your firewall. Using these applications will automatically edit
this file at the end of the process.
If you wish, you can manually create rules using /sbin/iptables and then type /sbin/service
iptables save to add the rules to the /etc/sysconfig/iptables file.
Once this file exists, any firewall rules saved there will persist through a system reboot or a service
restart.
For more information on iptables see Chapter 13.
3.7.1.17. /etc/sysconfig/irda
The /etc/sysconfig/irda file controls how infrared devices on your system are configured at
startup.
The following values may be used:
• IRDA=
value , where value is one of the following boolean values:
• yes — irattach will be run, which periodically checks to see if anything is trying to connect
to the infrared port, such as another notebook computer trying to make a network connection.
For infrared devices to work on your system, this line must be set to yes.
• no — irattach will not be run, preventing infrared device communication.
• DEVICE= value , where value is the device (usually a serial port) that handles infrared
connections.
• DONGLE=
value , where value specifies the type of dongle being used for infrared com-
munication. This setting exists for people who use serial dongles rather than real infrared ports. A
dongle is a device that is attached to a traditional serial port to communicate via infrared. This line
is commented out by default because notebooks with real infrared ports are far more common than
computers with add-on dongles.
• DISCOVERY= value , where value is one of the following boolean values:d
• yes — Starts irattach in discovery mode, meaning it actively checks for other infrared de-
vices. This needs to be turned on for the machine to be actively looking for an infrared connection
(meaning the peer that does not initiate the connection).
• no — Does not start irattach in discovery mode.
3.7.1.18. /etc/sysconfig/keyboard
The /etc/sysconfig/keyboard file controls the behavior of the keyboard. The following values
may be used:
• KEYBOARDTYPE=sun|pc, which is used on SPARCs only. sun means a Sun keyboard is attached
on /dev/kbd, and pc means a PS/2 keyboard connected to a PS/2 port.
• KEYTABLE=
file , where file is the name of a keytable file.