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Hello Experts,

Have a SBS server running Exchange and OWA, Remote Web Workplace and other stuff.

A second internet connection for backup will be added soon and probably a Sonicwall dual unit will be installed.

Having two fixed IPs, the challenge is for all services to failover correctly.

For MX Records, I see no problem. Just add a second one pointing to the the backup IP. I guess this is the only change for SMTP incoming traffic.

But the other hosts (i.e: OWA, REMOTE, etc), how can I make them failover to the second IP?

Thanks in advance.

asked 10/31/2011 08:07

phermi's gravatar image

phermi ♦♦


6 Answers:
The first thing that comes to mind is something like dyndns : http://dyn.com/dns/
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answered

erniebeek's gravatar image

erniebeek

ok, do you know or don't you know how to achive this?
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answered 10/31/11 06:18 AM

phermi's gravatar image

phermi

to clarify, I wonder how host.domain.com/owa can work when host can be IP1 or IP2 without having to use 2 different hosts and train 100s of users that if host1 does not work, to try host2

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answered 10/31/11 06:21 AM

phermi's gravatar image

phermi

The basic idea behind dynamic DNS is:
-you register your domain with a dynamic DNS provider.
-you run some client software on your LAN that monitors and registers your current public ip at the provider.

So you keep a 'static' URL, like host.domain.com/owa. As soon as the public ip changes, the records for your domain will be changed to point at the new address. This means that for users nothing changes, they still connect to host.domain.com/owa regardless of which public ip it points to.
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answered 10/31/11 06:30 AM

erniebeek's gravatar image

erniebeek

Thanks but that does not work and let me tell you why.

We have our own domain set that way and the DynDNS Updater does not allow anyone to set the update cycle. In our case, we have to wait up to 5 minutes for the change to happen or have to access the server running the updater to force an update.

I will not implement this kind of solution on a Client. By the way, this is not exclusive of DynDNS … most of the dynamic DNS services have implemented the same approach on its updaters.

This can't be the only option.
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answered 10/31/11 06:40 AM

phermi's gravatar image

phermi

link

answered 10/31/11 06:46 AM

erniebeek's gravatar image

erniebeek

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Asked: 10/31/2011 08:07

Seen: 2493 times

Last updated: 11/04/2011 02:54