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Redundant IP connections for Mac OS X Server

459 Views 5 Replies Latest reply: Nov 14, 2012 11:29 AM by Rohin Hattiangadi RSS
Rohin Hattiangadi Level 1 Level 1 (75 points)
Currently Being Moderated
Nov 8, 2012 10:19 AM

Hi,

 

We lost our Verizon DSL Service for 10 days due to flooding caused by hurricane Sandy in NYC.

All our DNS, Web, and email run on our server and we were lost to the world for those 10 days!

 

We have now upgraded to higher speed Time Warner broadband service for our primary, but still want to retain the Verizon DSL for redundancy.

Our hope is that if we have any connectivity issues with one, the other will hopefully be functioning and carry us through.

 

I have tried to research exactly how to configure our iMac based OS 10.6.8 Snow Leopard server to function properly in such a manner.

i.e. One server connected to the internet via two separate ISP connections (DSL & DOCIS cable modem)

 

I understand I will have to update our DNS (maintained on server) to properly reference BOTH static ip addresses and to set up a mail2.xx.com server to take over in case the mail.xx.com connection fails etc. etc.

 

I realize that our iMac has just ONE built in ethernet port, but Apple sells a USB to ethernet adaptors that can hopefully address this issue as well.

 

I would like to have 3 ethernet ports on my iMac - Port 1 to DoCIS/cable modem, Port 2 to DSL, and Port 3 to my network switch. This way the server connects directly to both the the internet connections, and the rest of the network connects to the internet through the server (and it's firewall)

 

i.e.

Internet (2 connections) > Server > Intranet

 

I cannot find any information on how to accomplish this on a Mac Server, and would appreciate any help, links etc. to put me on the right track.

 

Thank you in advance for your kind help.

 

Regards,

               Rohin

  • Austin Kinsella1 Level 6 Level 6 (11,505 points)

    Rohin Hattiangadi wrote:

     

    Hi,

     

    We lost our Verizon DSL Service for 10 days due to flooding caused by hurricane Sandy in NYC.

    All our DNS, Web, and email run on our server and we were lost to the world for those 10 days!

     

    We have now upgraded to higher speed Time Warner broadband service for our primary, but still want to retain the Verizon DSL for redundancy.

    Our hope is that if we have any connectivity issues with one, the other will hopefully be functioning and carry us through.

     

     

    Not answering what you are asking, but addressing the redundancy issue ...

    If you have a disaster like Sandy, with damage over a wide area, how sure are you that one of your connections will work? If for example the cabling is going through a common duct somewhere, your redundancy could be only theoretical. I know an installation that wanted reliable, disaster-proof communications, and paid for three services - and was offline when a builder a couple of miles up the road put his digger (back hoe?) through the shared pipe. Unless you can get guaranteed separation of service, it is not worth the extra cost and effort. Consider instead moving your server to a data centre, where they will already have addressed the issue, and your total cost may be no greater.

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