IP Addresses
Macintosh

IP Addresses

An IP (Internet Protocol) address is a unique identification number assigned to each computer, printer, or other device that is connected to the Internet. Each IP address consists of four sets of numbers, separated by dots. All Wellesley IP addresses appear as 149.130.xxx.xxx, with the final digits being variable. This page contains instructions for checking the IP address of a computer running Macintosh OS 9/X, as well as for renewing the IP address in the event of network connectivity issues.

How to check an IP address

Macintosh OS X v. 10.3
Macintosh OS X v. 10.2
Macintosh OS 9

How to release and renew an IP address

Macintosh OS X v. 10.3
Macintosh OS X v. 10.2
Macintosh OS 9

Checking an IP Address on Macintosh OS X v. 10.3

1. From the apple menu, select System Preferences and click on the Network control panel.

2. From the Show pull-down menu, select Built-in Ethernet and click on the TCP/IP tab.

3. If the IP Address reads 149.130.xxx.xxx, then it is a valid Wellesley IP address.

Checking an IP address on Macintosh OS X v. 10.2

1. From the apple menu, select System Preferences and click on the Network control panel.

2. From the Show pull-down menu, select Built-in Ethernet and click on the TCP/IP tab.

3. If the IP Address reads 149.130.xxx.xxx, then it is a valid Wellesley IP address.

Checking the IP address on Macintosh OS 9

1. From the apple menu, select Control Panels and then click on TCP/IP.

2. If the IP Address reads 149.130.xxx.xxx, then it is a valid Wellesley IP address.

Renewing an IP Address on OS X v. 10.3

1. From the apple menu, select System Preferences and click on the Network control panel.

2. From the Show pull-down menu, select Built-in Ethernet and click on the TCP/IP tab.

3. Click Renew DHCP Lease. This should renew the computer's IP address immediately to 149.130.xxx.xxx. If it does not, take note of the incorrect IP address in the log.

Renewing an IP address on OS X v. 10.2

1. From the apple menu, select System Preferences and click on the Network control panel.

2. From the Show pull-down menu, select Built-in Ethernet and click on the TCP/IP tab.

3. Type the number 1 into the DHCP Client ID box.

4. Click Apply Now. This will force the computer to search for a new IP address.

5. Delete the 1 that you typed.

6. Click Apply Now again. This should renew the computer's IP address to 149.130.xxx.xxx. If it does not, take note of the incorrect IP address in the log.

Renewing an IP address on OS 9

1. From the apple menu, select Control Panels and then click on TCP/IP.

2. From the Configure pull-down menu, select Using DHCP Server.

3. Type the number 1 into the DHCP Client ID box.

4. Close the TCP/IP window and click Save when prompted.

5. From the apple menu, select Control Panels and then click on TCP/IP.

6. Delete the number 1 that you entered in the DHCP Client ID box.

7. Close the TCP/IP window and click Save when prompted. This should renew the computer's IP address to 149.130.xxx.xxx. If it does not, take note of the incorrect IP address in the log.