Office Web Apps Server Name issue with Sharepoint 2013

I have a POC Lab setup for SharePoint/OfficeWebApps with SSL offloading. I am using IIS reverse proxy for my SSL offloader. Most systems can connect to SharePoint and OWA through the Loadbalancer and create documents as desired. The
configuration is as follows:
DNS points:
sharepoint.contoso.com to the reverse proxy address that handles sharepoint.
owa.contoso.com to the reverse proxy address that handles owa.
My OfficeWebApps farm uses an internal and external url of
https://owa.contoso.com and uses ssloffload.
My SPWOPIBinging connects to owa.sharepoint.com (through the reverse proxy) and is configured with the external-https zone.
The name of the OWA server is nyc-owa1.contoso.com.
The issue is as follows:
If I flush my dnscache before connecting to
https://sharepoint.contoso.com, and then use OWA in sharepoint, my client DNS cache will list sharepoint.contoso.com, owa.contoso.com AND nyc-owa1.contoso.com!
Where is is getting the name of the actual owa server?
If I simulate an Internet client that cannot resolve the internal name nyc-owa1.contoso.com, but only the public names of sharepoint.contoso.com and owa.contoso.com, the client cannot successfully edit a new or existing file with OWA, the browser hangs with
Java errors ('SYS' is undefined etc.)
When I add either the real IP address of the server nyc-owa1.contoso.com OR the reverse proxy address for nyc-owa1.contoso.com to a hosts file, the client works normally.
I would like to know how the client is getting the OWA server's name and how to control that behavior.
Thanks for reading this!!
-Scott

I'm glad to here that the problem has been fixed. Thank you for sharing your experience here, it will be helpful to other community members who have similar questions.
Cheers,
Steve Fan
TechNet Community Support

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http://blog.sharedove.com/adisjugo/index.php/2012/09/29/open-sharepoint-files-in-edit-mode-from-client-applications-and-not-read-only/
http://stackoverflow.com/questions/375390/office-documents-prompt-for-login-in-anonymous-sharepoint-site
http://yalla.itgroove.net/tag/anonymous-access/
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Dear All,
I am encounter problem when I try to open document from my browser. Prompt message will pop-out when it try to preview a document:
"sorry, there was a problem and we can't open this document. If this happens again, try opening the document in Microsoft word"
When I check in Event viewer, there is an error display:
"Could not contact WOPI End Point. Error details - 'Unauthorized url - http:bla.bla.bla....."
Kindly advise on how should I resolve this issue.
Application Note:
1. Windows OS: Windows Server 2012 R2
2. Office Web Server 2012 SP1
3. SharePoint Server 2013
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Verify if you have configured correctly by checking the following post
https://technet.microsoft.com/en-us/library/ff431687.aspx
In case everything is correct, Please check the following post for similar issue
https://social.technet.microsoft.com/Forums/sharepoint/en-US/f7be5f88-8c98-464e-8596-60956b5e98fd/sharepoint-2013-office-web-apps-problem-unable-to-openviewedit?forum=sharepointgeneral.
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Hi ,
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Forum Support
Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Subscriber Support,
contact [email protected]
Eric Tao
TechNet Community Support

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I'm trying to use the Office Web Apps Server 2013 as an online viewer of Office documents (using the Online Viewer). I've set up a New-OfficeWebAppsFarm with editing disabled, no UNC paths, and an external URL with SSL Offloaded to my Load balancer.
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