down list, choose Shared. That will enable IP trac forwarding and run a DHCP
server on the device. Conrm your changes in NetworkManager.
2. As the DCHP server uses port 67, make sure that it is not blocked by the rewall:
On the machine sharing the connections, start YaST and select Security and
Users > Firewall. Switch to the Allowed Services category. If DCHP Server is
not already shown as Allowed Service, select DCHP Server from Services to
Allow and click Add. Conrm your changes in YaST.
How to provide static DNS information with automatic (DHCP, PPP, VPN) addresses?
In case a DHCP server provides invalid DNS information (and/or routes), you can
override it. Start the dialog for conguring network connections from the GNOME
Control Center with System > Network Congurations or in KDE 4 from the Per-
sonal Settings with Advanced > Network Settings. Choose the connection you
want to modify and click Edit. If you are using GNOME, switch to the IPv4 Settings
tab, and from the Method drop-down list, choose Automatic (DHCP) addresses
only. If you are using KDE, switch to the IP Address tab, and from the Congure
drop-down list, choose Automatic (DHCP) addresses only. Enter the DNS informa-
tion in the DNS Servers and Search Domains elds. From the drop-down list at
the bottom of the tab, select Routes if you want to Ignore automatically obtained
routes. Conrm your changes.
How to make NetworkManager connect to password protected networks before a
user logs in?
Dene a system connection that can be used for such purposes. For more infor-
mation, refer to Section 5.7, “NetworkManager and Security” (page 65).
5.9 Troubleshooting
Connection problems can occur. Some common problems related to NetworkManager
include the applet not starting or a missing VPN option. Methods for resolving and
preventing these problems depend on the tool used.
NetworkManager Desktop Applet Does Not Start
The GNOME and KDE NetworkManager applets start automatically if the network
is set up for NetworkManager control. If the applet does not start, check if Net-
workManager is enabled in YaST as described in Section 5.2, “Enabling Network-
Manager” (page 55). Then make sure that the appropriate package for your
desktop environment is also installed. If you are using KDE 4, the package is
NetworkManager-kde4. For GNOME users the package is NetworkManager-gnome.
If the desktop applet is installed but is not running for some reason, start it
manually with the command nm-applet (GNOME) or knetworkmanager (KDE).
NetworkManager Applet Does Not Include the VPN Option
Support for NetworkManager, applets, and VPN for NetworkManager is distributed
in separate packages. If your NetworkManager applet does not include the VPN
option, check if the packages with NetworkManager support for your VPN technol-
68 Start-Up
