Static IP Question

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Level 1

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Static IP Question

This is probably an easy answer but I can't easily test it at the moment.

If I assign my Macbook Pro a static IP address on my network (172.16.0.xxx) (connected via airport) to use for port forwarding on my router, will it still try to use this IP address when I connect to another network?

Macbook Pro, Mac OS X (10.6.2), 15in, 2gb ram, 120gb hd

Posted on Jan 2, 2010 10:17 AM

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Answer 1

Jan 2, 2010 11:24 AM in response to C. Anderon

C. Anderon wrote:
If I assign my Macbook Pro a static IP address on my network (172.16.0.xxx) (connected via airport) to use for port forwarding on my router, will it still try to use this IP address when I connect to another network?

I'd expect so. You could define another "location" in the Network panel of System Preferences to keep your home settings separate from those you use elsewhere.

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Answer 2

Kappy

Level 10

362,007 points

Jan 2, 2010 11:48 AM in response to C. Anderon

Just be sure that you enable the 172... address block in Airport Utility. Alternatively do the same thing in the default address block. In Network preferences use DHCP with manual addressing instead of DHCP. It would be a good idea to use an IP address somewhere in the middle of the block's range as the DHCP server tends to use IPs from the bottom or the top of the range for wired and wireless devices, respectively.

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Answer 3

C. Anderon Author

Level 1

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Jan 2, 2010 11:53 AM in response to Kappy

Im' not using a airport router, just the airport wireless card to connect to my Linksys WRT54G that is running DD_WRT.

It's already been moved from the 192.168.1.xxx range to 172.16.0.xxx to avoid VPN conflicts with the 192.xxx.xxx.xxx and 10.xxx.xxx.xxx ranges.

172.16.0.1-99 is used for my 3 wireless routers and things such as NAS and network printers.
172.16.0.100-199 is DHCP
172.16.0.200-255 is for Static Computer IP's

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Answer 4

Barney-15E

Level 10

122,264 points

Jan 2, 2010 12:08 PM in response to C. Anderon

Can you tell your router to assign a specific IP address to that machine via MAC address? That makes it easier since you can leave the location set to Automatic (or whatever you choose). At home, the router will give it the correct address for port forwarding, and on the road, it will connect via DHCP and get whatever IP that network assigns.

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