How do I make my Mac Mini do bridging over wireless instead of NAT?

procrastination — Thu, 02 Oct 2008 15:26:27 -0800

How do I use my Mac Mini to share its ethernet network connection over the wireless connection, but in a way that NAT is not used? In other words, how do I make my Mac Mini do bridging over the wireless connection? Here is my network setup:

Cable Modem -> Router (IP 192.168.0.1)

Router connects to two desktop Macs:

Router -> Upstairs Mac (192.168.0.6)
Router -> Downstairs Mac (192.168.0.50)

I want to use the downstairs mac as a wireless access point. I have done this using Internet Sharing, which works fine *except* that devices on the wireless get a 10.0.0.* address. Computers on the 10.0.0.* net, like my laptop and iPhone, and cannot see the shared services of the upstairs mac, such as iTunes and iChat over Bonjour.

The problem seems to be that the mac with the wireless connection automatically uses NAT, and I can't figure out how to make it just do bridging. I would like for devices that connect to the wireless to get a 192.168.0.* address, and be able to route across the mac mini to get IP addresses from the router by DHCP.

Can anyone tell me how to do that? I am perfectly comfortable with the command line, but am just not sure how to configure it.

Disabling comcast bridge-mode on a Comcast modem

destro — Mon, 31 Jul 2006 14:43:35 -0800

How do I bypass router bridging on a Comcast cable modem? I believe Comcast turned on router bridging on my internet connection, where it prevents me from using a router on my connection to the internet. I've checked the router, upgraded the firmware, done all of the resets, and everything else seems to be fine.

This has happened to me before where Earthlink turned on bridge-mode on their DSL modem. I was eventually able to go into the controls for the modem and turn it off but not after about 3 days of complete frustration. What I need is the URL for the modem. With the Earthlink situation, I had to guilt the lady at technical support into giving it up. I'm hoping somebody here at Mefi has been through the same thing and can just pass along those numbers.

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How do I make my Mac Mini do bridging over wireless instead of NAT?

Disabling comcast bridge-mode on a Comcast modem