Novell LINUX ENTERPRISE SERVER 11 - ADMINISTRATION Administration Manual page 237

On Hotplug, the interface is set as soon as available. It is similar to the At Boot
Time option, and only differs in the fact that no error occurs if the interface is
not present at boot time. Choose Manually to control the interface manually with
ifup or KInternet. Choose Never to not start the device at all. The On NFSroot
is similar to At Boot Time, but the interface is does not shut down with the
rcnetwork stop command. Use this if you use an nfs or iscsi root file system.
3 Click Next.
4 To activate the configuration, click OK.
Usually, only the system administrator can activate and deactivate network interfaces.
If you want any user to be able to activate this interface via KInternet, select Enable
Device Control for Non-root User via Kinternet.
Setting Up Maximum Transfer Unit Size
You can set a maximum transmission unit (MTU) for the interface. MTU refers to the
largest allowed packet size in bytes. A higher MTU brings higher bandwidth efficiency.
However, large packets can block up a slow interface for some time, increasing the lag
for further packets.
1 In YaST select a card from the list of detected cards in Network Devices > Network
Settings and click Edit.
2 In the General tab, select the desired entry from the Set MTU list.
3 Click Next.
4 To activate the configuration, click OK.
Configuring the Firewall
Without having to enter the detailed firewall setup as described in Section "Configuring
the Firewall with YaST" (Chapter 15, Masquerading and Firewalls, ↑Security Guide),
you can determine the basic firewall setup for your device as part of the device setup.
Proceed as follows:
1 Open the YaST Network Devices > Network Settings module. In the Overview
tab, select a card from the list of detected cards and click Edit.
Basic Networking 223