domain name server (DNS) addresses ( 12.42.144.3 and 12.42.144.6 )
whether you should choose DHCP or manual IP address configuration, which will be done in Step 6 below.
For manual configuration only:
IP address
router address
subnet mask
Note: It is possible that your ISP or local network does not provide DNS addresses, but rather has a method for providing this automatically.
Choose System Preferences from the Apple Menu.
Choose Network from the View menu.
Choose Built-in Ethernet from the Show pop-up menu (the "Configure" menu prior to Mac OS X 10.1).
Click the TCP/IP tab, if necessary.
Choose either Manually or Using DHCP from the Configure pop-up menu, as you were instructed by your ISP in Step 1.
Type the other information you gathered in Step 1 into the corresponding fields. Unless your ISP instructs you otherwise, you may ignore the DHCP Client ID field and the Search Domains field.
Click Apply Now.
Open a Web browser or other TCP/IP application to test your connection to the Internet.