[MacTUG] Time Machine, OS X Servers and subnets

[Glenn Anderson]

Don,

I don't know if this offers a solution or not, but one can plug in an  
Apple USB ethernet adapter ( $29) into the mini and get a second  
ethernet port. Note: I am not sure if one can put in more than one of  
these devices.

This will allow the mini to be "on" two sub-networks and thus I think  
advertising it's services over both sub-networks. I can't guarantee  
this, but it might be worth a try... if it works maybe this is a good  
solution in some cases.

Note: I believe the USB adapter is limited to 100 mb, but so likely is  
the subnet one has the macs on anyways so it may not be that much of  
an issue.


On 23-Nov-09, at 1:23 PM, Donald Duff-McCracken wrote:

> Hi
>
> I got my first little mac mini server, boy is it cute! I am going to  
> be using this one for deployment, but I will likely get others for  
> time machine backup.
>
> >From my experiences so far, Time machine on the client cannot  
> discover the server when it is on a different subnet. (It is dead  
> simple on the same subnet, however.)
>
> However, for macs on a different subnet this seems to work:
> mount the server partition that I am backing up (the server titles  
> it “Backups”) to. You do NOT need to tell keychain to remember the  
> password
> tell Time Machine to use that partition and authenticate onto that  
> partition. (I am guessing it keychains this authentication)
> at this point when Time Machine starts it mounts the the “Time  
> Machine Backups” directory from the “Backups” partition does its  
> magic and goes away. While I am not keen on the fact that it visibly  
> mounts the directory — when Time Machine is used from a machine on  
> the same subnet that was setup automatically, it does not visibly  
> mount it.
>
> I have tried restarting the  client and doing a Time Machine backup  
> and it seems to work fine. The only real downsides with this method  
> are: A) I would likely need to set this up for most users. B) It has  
> the backup partitions being a bit more visible during the backup  
> process.
>
> While I initially was a bit more concerned about security as the  
> Backups partition of the server is being mounted, it looks like the  
> becomes a partition that anyone remotely backing up via Time Machine  
> can access — Time Machine is just hiding things a bit more. Has  
> anyone been playing with this yet, or give feedback on my methods  
> (esp with regards to security issues)? I will probably wind up with  
> a couple of these backup servers for the main subnets with clients  
> on them, but I will have a few folks on oddball subnets that I will  
> likely need to connect.
>
> don
> ------------------------------------
> Donald Duff-McCracken
> Technical Services Manager
> Mapping, Analysis & Design
> Faculty of Environmental Studies
> University of Waterloo
> (519) 888-4567 x32151
> http://www.fes.uwaterloo.ca/computing/people/don.html
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