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  1. Agustin's Linux Manual
  2. System Administration
  3. About the Author
  4. Contents
  5. Administration
  6. Terminals
  7. Command Basics
  8. Root Directory
  9. Executing Commands
  10. File specs
  11. File Permission
  12. How permissions are assigned
  13. Change ownership chown
  14. Running multiple commands
  15. Killing Processes
  16. Bash configuration files
  17. VI Editor
  18. Creating path environment
  19. Midnight Commander
  20. Linuxconf Utility
  21. Networking
  22. Domain Name Service DNS
  23. Router and Gateway
  24. Adding Users
  25. User Accounts
  26. Managing Groups
  27. Mounting File System
  28. NFS Mounts
  29. Disk Quotas
  30. Run levels
  31. Linuxconf Control
  32. Mandrake Control Center
  33. Creating a Boot Disk
  34. Switching Boot Mode
  35. Hardware Configurations
  36. Printer Configuration
  37. Installing Printers
  38. Samba Printer
  39. Managing services
  40. Managing Users
  41. Program Scheduler
  42. Software Management
  43. Installing CUPS

Router and Gateway

The DNS is not the only one required to accomplish the connection to the server. Before it actually contacts the DNS, the client computer needs to know the door to get out. That door is known as gateway. Without the gateway, the connection will not be possible. The computer may actually look for the default local host, but the local host ( is not the correct path to get out. That is the reason that whenever you declare values to the net card it needs to know all this information.

Resolver configuation
Fig. 3.15

The information is given in two ways… static or dynamic. Static means you place the values manually and dynamic means it is assigned automatically by the remote server.

Fig. 3.16
  • Enter the default gateway IP address number and make sure it is enabled.
  • Click on Accept.
  • Click on Dismiss
  • Click on Dismiss again
  • Click on Quit

On figure 3.17, my gateway is the router, because the router is the actual door to the Internet (read chapter 2 routers). Note that you cannot assign that IP number to another host instead all hosts must have this number as its gateway if they are in the same subnet.

Fig. 3.17
  • Click on Do it

Once you click on Do it, the changes are saved. You can now reboot the system. At boot time you will see your network adapter (Bringing interface eth0 up …….OK)
Congratulations you successfully configured your network adapter.