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MAC OS X: Manual IP Address Setup

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Question

How do I manually configure my Macintosh computer with an IP address?

Answer
In some cases, the TCP/IP settings on the Macintosh machine may need to be manually configured for Internet access.  This would include manually configuring the IP Address, Subnet Mask, Default Gateway, and DNS addresses. This will cause the IP address on the Mac computer to remain the same, and not change.  This is useful when the Mac computer needs to be remotely accessible, and NAT settings (such as port forwarding or DMZ) have been configured in the router.  This document describes how to manually configure the TCP/IP settings within Mac OS X.

NOTE: Mac OS X is configured for a DHCP TCP/IP connection by default. 


Manual Configuration: Snow Leopard (10.6) and Leopard (10.5)

  1. Click the Apple icon on the upper left-hand corner.
  2. Select System Preferences

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  • Click the Network icon in the Internet & Wireless section.

 
  • Select Built-in Ethernet from the left-hand menu.
  • Click the Advanced button on the bottom of the Network window. 

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  • Select the TCP/IP tab. The TCP/IP options appear.
  • In the TCP/IP options: 
    a.   Configure IPv4 - Select Manually.
    b.   IP Address - Enter the desired IP address.
    c.   Subnet Mask - Enter the desired subnet mask.
    d.   Router - Enter the desired default gateway address. 

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Manual Configuration: Tiger (10.4)

  • Click on the DNS tab.  The DNS options appear.
  • For the DNS options:
    a. Click the Plus (+) button under DNS Servers box.
    b. Enter DNS addresses specified by Internet provider.
    c. Click the OK button.

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    1. Click the Apple icon on the upper left-hand corner.
    2. Select System Preferences

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  • Click the Network icon in Internet & Network section.  The Network window appears.
  • Select Built-in Ethernet from the list and click on Configure

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  • Select the TCP/IP tab. The TCP/IP options appear.
  • In the TCP/IP options: 
    a.   Configure IPv4 - Select Manually.
    b.   IP Address - Enter the desired IP address.
    c.   Subnet Mask - Enter the desired subnet mask.
    d.   Router - Enter the desired default gateway address. 
    e.   DNS Servers - Enter the DNS addresses specified by the Internet provider.
    f.    Click the OK button. 
  • Click the Apply Now button. 

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