OpenSuSE 12.3 - configure statically assigned IP address

There are several ways of setting a static IP address  in OpenSuSE 12.3. If you are not familiar with linux commands, then you can use the graphical setup from Yast to setup network configuration. Network settings can be configured by using Network Manager or by using traditional method with ifup.
This tutorial will show you how to configure statically assigned network IP in OpenSuSE 12.3 with ifup. This can be easily done by following those simple steps:
- open Yast > Network Devices > Network Settings
- go to Global options tab and make sure that Traditional method with ifup is checked, then write a hostname in the Hostname to send field and uncheck Change Default Route via DHCP.

- go to Hostname/DNS tab, write in your Hostname and your Domain (workgroup name) and uncheck Change Hostname via DHCP; enter the DNS address in Name Servers and Domain Search List section (if you don't know the dns addresses, you can find them on your modem's interface)

- go to Overview tab, choose your network card and then click on Edit
- check Statically assigned network IP and write in your desired IP address, then click Next to apply settings for network card

- click Route on the Network Settings, write in the gateway IP address and click OK to save changes to your network settings.

To test settings, open a web browser and load a webpage. If internet doesn't work, try to open the modem's admin page. If the admin page loads, but you cannot access internet, then you entered wrong ip address for the gateway or you didn't write it at all.