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Use Parallels and NAT to access certain network setups Network
If, like me, you use Parallels Desktop a lot on for-pay access points, or otherwise locked-down networks, where adding an additional MAC address to the same wireless card might cause problems, then this hint is for you.

A sign that you're having an issue is that you get the T-mobile authentication page, or none of the networks inside your Parallels virtual machines seem to work. You'll also note that the systems seem to be on the same subnet, e.g. 10.254.x.x.

The solution that I've found works is to go into Parallels' network configuration section, and tell it to bind to en0. Then go into the Sharing pane in OS X's System Preferences and tell it to share from AirPort to Ethernet. This has the effect of setting up NAT to your en0 interface, and Parallels hooks into that to get internet access. Since everything is masqueraded through your airport (en1) interface, it magically works.
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Use Parallels and NAT to access certain network setups | 4 comments | Create New Account
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Use Parallels and NAT to access certain network setups
Authored by: murmur on Oct 20, '06 10:42:44AM

Can you be a bit more specific on how to bind the parallels VM to eth0?

I've been having the same problem on our campus network and would love to get my VMs seeing the outside world.



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Use Parallels and NAT to access certain network setups
Authored by: mike3k on Oct 20, '06 11:08:11AM

Instead of using Bridged Ethernet, use Host-only network in Parallels. You'll see a new network port, en2, which you should share the connection to, not en0.



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Use Parallels and NAT to access certain network setups
Authored by: belanger on Oct 20, '06 08:21:55PM

Interesting...

I've been trying to get Parallels working through the OS X VPN. Would this technique allow that?



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Use Parallels and NAT to access certain network setups
Authored by: HeelToe on Oct 23, '06 08:18:45PM
I just documented the setup I use to do this.

I have tried using Mac OS X Internet sharing, but I've not been happy in how it interacts with the Mac OS X firewall (i.e., turn on personal web sharing to get web ONLY, or turn off the firewall to allow everything).

Here's how I do it:

http://collectivity.goof.com/articles/2006/10/23/relatively-easy-nat-for-parallels

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