Two internet connections to single Mac Pro

Discussion in 'Mac Pro' started by linuxcooldude, Mar 31, 2012.

  1. linuxcooldude macrumors 68020

    Mar 1, 2010
    I have two separate internet providers to hook to dual network card in Mac Pro. Is there a way to dedicate what apps can use what internet connection?
  2. relbbircs macrumors regular

    Nov 26, 2007
    OK, just out of curiosity, I have to ask. Why would you want to do that?
  3. saulinpa macrumors 6502a

    Jun 15, 2008
    You could use a virtual machine and tie one network card to it.
  4. JesterJJZ macrumors 68020


    Jul 21, 2004
    Bandwidth management I'd say. Have internet one on, FTP server or web server on another?
  5. derbothaus macrumors 601


    Jul 17, 2010
    I think you would HAVE to virtualize to do this though. You can't, to my knowledge, tell Safari to use port A and Skype port B on same OS. You may be able to play with ports in a conf file but whatever gets 80 will do most of the lifting.
  6. initialsBB macrumors 6502a

    Oct 18, 2010
    I actually had someone ask me this question not long ago. He wants to have one internet line for backing up his XDCAM footage online without crippling access to web, ftp and email...

    So running the backup software in a VM would do this ?
  7. wafl iron macrumors regular

    Nov 16, 2007
    if both ports can access the same network then you dont have much control over which one is used when you access say ""

    Sort of how you have to set a default gateway for your network stack, it has to be set to the gateway of one of the two routers you are using.

    Now if both routers were on isloated networks, then you would be ok, but i doubt that is the case for you.

    As someone said earlier, you can create a VM and give it a network card for port B, while you have your macpro use port A.
  8. Ccrew macrumors 68020

    Feb 28, 2011
    If the second network is dedicated to just using backup (or a single connection scenario) and is limited to pretty much a point to point connection across a second interface it's easy enough to do it with a static route that sends that traffic only across the second interface - wouldn't need a VM to do it.

    Good breakdown here, you do have to be a bit network/command line savvy:

    What the OP is asking for though with trying to split traffic based on application is going to be the VM solution others have suggested.
  9. DanielCoffey macrumors 65816


    Nov 15, 2010
    Edinburgh, UK
    Sounds like you need a router with firmware with comprehensive QOS support so you can manage which apps get priority or reserved bandwidth.
  10. derbothaus macrumors 601


    Jul 17, 2010
    That would not do it. Unless QOS got super powerful.
  11. charlieegan3 macrumors 68020


    Feb 16, 2012
    don't you get usb Ethernet adapters? like for the MBA
  12. marzer macrumors 65816


    Nov 14, 2009
    The question should be, "Why wouldn't you want to do that?" :D

    Never used it but link aggregation is mentioned on the Lion server page, All Features:

    "Ethernet link aggregation with network interface failover
    Also known as IEEE 802.3ad, link aggregation allows you to configure multiple network interfaces to appear as a single interface — with the same MAC address, the same IP address, and the same server host name. Link aggregation also eliminates a potential single point of failure: If one interface fails, the remaining interface maintains the network connection."

    May be a good start at least...
  13. derbothaus macrumors 601


    Jul 17, 2010
    Nope. You could always bond your links. That is not what OP wants.
  14. marzer macrumors 65816


    Nov 14, 2009
    In that case probably best to rely on VM's to assign the interface to specific apps, unless the OP wants to dig deep into config files and port assignments.
  15. Jamesbot macrumors member

    Jun 19, 2009
    iptables? the apps would have to use specific ports tho, i think.

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