We have set up Network Load Balancing (NLB) on two Hub Transport/Client Access servers. (Windows Server 2008/Exchange Server 2007)

344705 pts.
Tags:
Client Access Server Role
Exchange 2007
Exchange administration
Hub Transport Server
IIS
Network Load Balancing
Outlook
OWA
Windows Server 2008
We have set up Network Load Balancing (NLB) on two Hub Transport/Client Access servers. (Windows Server 2008/Exchange Server 2007) When we go directly to either of the nodes, we can access OWA just fine. However, when we try to go to the new NLB cluster, by name or IP address, we get this: The page cannot be displayed The page you are looking for is currently unavailable. The NLB cluster name and IP are in DNS; nslookup works fine and we can ping it by name and IP address. What am I missing? We have followed several articles to the letter. They all have the same information and do not indicate the need for any additional configuration once the cluster is set up. Is there any configuration needed in IIS (or anywhere else) for this?

Answer Wiki

Thanks. We'll let you know when a new response is added.

I ran across this same problem a couple years ago. The problem was that the NLB appliances did not support FBA (Forms Based Authentication). I was told that without FBA, OWA would not work because, in essence, the http datastream is being split mid-conversation between the two OWA servers.

It’s definitely worth investigating your NLB devices and whether or not they support NLB or OWA indirectly.

Another thing to look at is the implementation of of ISA Server to handle (or at least receive the datastream from) the NLB devices. ISA Server does support NLB and makes a pretty darn good firewall as well.

Discuss This Question:  

 
There was an error processing your information. Please try again later.
Thanks. We'll let you know when a new response is added.
Send me notifications when members answer or reply to this question.

REGISTER or login:

Forgot Password?
By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Forgot Password

No problem! Submit your e-mail address below. We'll send you an e-mail containing your password.

Your password has been sent to:

To follow this tag...

There was an error processing your information. Please try again later.

REGISTER or login:

Forgot Password?
By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Thanks! We'll email you when relevant content is added and updated.

Following