6 Replies Latest reply: Jul 6, 2013 7:29 PM by 4thSpace
4thSpace Level 1 Level 1 (0 points)

From this discussion yesterday https://discussions.apple.com/message/22403299#22403299, I bought an Airport Express and have it now setup.

 

Here's what my network looks like:

 

I have two Airport Express routers.  One is a Time Capsule.  I have two ISPs.  Each router is fed its own ISP.  This means I also have two networks and Internet connections.  Each of two computers (Mac Mini and MBP) are on a network.

 

From the above thread, I thought they would not see each other because they are on separate networks.  But in Finder, they can see each other.  Airdrop and all shows up too. Screen Sharing works fine.

 

How is that happening since they are different networks?  Is that something specific to the Airport Express routers or my sharing settings? 

 

Each computer is able to toggle between the two networks, which are password protected.  I'm guessing somewhere in there is why they can see each other.

  • 1. Re: How to 2 computers on different routers still see each other?
    Bob Timmons Level 9 Level 9 (78,715 points)

    I have no idea how you might have configured things to arive at this result, but you are doing something that you thought you weren't....or....you are not doing something that you thought you were.

     

    I have both a DSL connection and a cable connection here, with Apple routers connected to each modem. Neither network can "see" any devices on the "other" network.

  • 2. Re: How to 2 computers on different routers still see each other?
    4thSpace Level 1 Level 1 (0 points)

    I called Apple to get some details on this.  Actually, what's happening is very simple.  It's the same as when you go to a hotel and you can see all kinds of other machines.  Those machines broadcast their presence because sharing is turned on.  However, to access any resources on one of those machines, you'll need to know the password.  Same as what I have here.

     

    So, best of both worlds: Two networks with dedicated Internet connect and no need to flip between networks since both machines can always see each other.

     

    Neither network can "see" any devices on the "other" network.

     

    Not sure what happened there but I would find that inconvenient.

  • 3. Re: How to 2 computers on different routers still see each other?
    Bob Timmons Level 9 Level 9 (78,715 points)
    I called Apple to get some details on this.  Actually, what's happening is very simple.  It's the same as when you go to a hotel and you can see all kinds of other machines. 

     

    No, at a hotel all devices are on the same network.  You can "see" them for that reason because they all share the same subnet. The fact that you can "see" them does ot necessarily mean that you can connect to them unless they have sharing enabled and you have the log on credentials for a device.

     

    If you are using two different ISPs and have two different Internet connections, you have two separate networks.

     

    There is no way that you should be able to "see" devices on one network from another network. If this is what you are telling us is occuring, that is very disturbing since it implies that other neighbors around you may be also be able to access your network and use your Internet connection....even though they might not be able to connect to your devices.

  • 4. Re: How to 2 computers on different routers still see each other?
    4thSpace Level 1 Level 1 (0 points)

    I'm sure they can see both routers just as I can see a number of other routers near me.  But they can only access them (and their Internet connections) if they have the network passwords.

  • 5. Re: How to 2 computers on different routers still see each other?
    Bob Timmons Level 9 Level 9 (78,715 points)

    You have a very strange Internet Service Provider if things like this are allowed. Things like this were fairly common 10 years ago. They need to update their equipment and security.

     

    But, if you are happy, then we are happy.

  • 6. Re: How to 2 computers on different routers still see each other?
    4thSpace Level 1 Level 1 (0 points)

    Yes - very happy.

     

    A little more info from Apple: These two machines aren't looking across networks to see each other.  It's part of their pseudo network created via AirDrop.