On Aug 12, 2009, at 5:55 PM, Randy wrote:

>
> Hi All,
>
> After getting my new iMac in ln March, I've pondered just how to get
> the "back to my mac" to function. It can't work as setup now due to
> double Nat. As a somewhat Novice to intermediate user, I recall those
> terms from 2000 when we first got DSL and setup a home network. I
> understand DCHP automatically finds and assigns ip addresses as
> needed, but am also familiar with setting them up manually.

For this to work, you need to do several things:

Know your home outward facing IP address, the one your provider  
assigns your DSL connection. Two ways to do that< look at your  
airport's setup page to see what the external IP address is and write  
it down (most home ISP's provide very long dhcp lease times, and often  
give you the same IP address when the lease expires) or use a dynamic  
DNS service like dyndns.com to get a free dyndns.com IP address which  
is kept linked to your home address.

You'll have to assign the Mac a static IP address within the Airport's  
address pool; you can do that in Networks control panel, and then  
configure NAT on the Airport to pass the BAck to My Mac requests to  
that Address.

This is explained pretty well here <http://db.tidbits.com/article/9322>


-- 
Bruce Johnson
University of Arizona
College of Pharmacy
Information Technology Group

Institutions do not have opinions, merely customs



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