Additional configuration needed on client machines when TIBCO Spotfire Server Kerberos Authentication is configured with non-default HTTP port

Additional configuration needed on client machines when TIBCO Spotfire Server Kerberos Authentication is configured with non-default HTTP port

Description:
Some additional configuration needed for each clients for Kerberos Authentication when TIBCO Spotfire Server is configured with non-default HTTP port (80 or 443).

Symptoms:
Kerberos Authentication may fail on browsers such as Internet Explorer, Chrome, Firefox and Spotfire Analyst with different ERROR messages.
Common errors encountered in the TIBCO Spotfire Server logs are:
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ERROR 2015-09-17T13:07:36,376-0500 [unknown, #0] server.security.KerberosAuthenticator: Failure when executing privileged Kerberos authentication action
GSSException: Failure unspecified at GSS-API level (Mechanism level: Checksum failed)
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ERROR 2015-09-15T22:48:35,936-0500 [unknown, #1] server.security.KerberosAuthenticator: Failure when executing privileged Kerberos authentication action
GSSException: Failure unspecified at GSS-API level (Mechanism level: Encryption type AES256 CTS mode with HMAC SHA1-96 is not supported/enabled)
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ERROR 2015-09-16T21:38:22,098-0500 [unknown, #0] server.security.KerberosAuthenticator: Failure when executing privileged Kerberos authentication action
GSSException: Failure unspecified at GSS-API level (Mechanism level: Invalid argument (400) - Cannot find key of appropriate type to decrypt AP REP - AES256 CTS mode with HMAC SHA1-96)
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In the above ERROR messages, "Checksum failed" is common.

Cause:
By default, a client does not include a port number in SPN within the TGS request for Kerberos Authentication. The authentication fails as SPN without a port is not registered in the Domain Controller. For nondefault ports, SPN is to be registered in following format, including the port number.

 > "HTTP/tss_server_host:port".

NOTE:
This behavior has been tested on IE 11, Chrome 46.0.2490.71 and Firefox 41.0.2 A common solution is to register one more SPN for Spotfire Server along with existing ones for the default port in following format: HTTP/SpotfireServerHostName.DomainName.

However this approach is not acceptable in every scenario, especially in cases where there is already a service registered for the default port on Spotfire Server. The following approach can be used.

For Internet Explorer:
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*** On 32-bit computers:
> Open Windows Registry Editor (Run regedit.exe).
> Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl .
> Create a new Key named "FEATURE_INCLUDE_PORT_IN_SPN_KB908209" .
> Create a new "DWORD Value" named "iexplore.exe" on the above key and change its value to 1.
> Exit Registry Editor.

*** On 64-bit computers:
> Open Windows Registry Editor (Run regedit.exe).
> Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\Main\FeatureControl .
> Creat a new Key named "FEATURE_INCLUDE_PORT_IN_SPN_KB908209" .
> Create a new "DWORD Value" named "iexplore.exe" on the above key and changes its value to 1.
> Exit Registry Editor.
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For Google Chrome:
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> Open Windows Registry Editor (Run regedit.exe).
> Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Google\Chrome. (Create Google and Chrome keys if they do not exist).
> Create a new "DWORD Value" named EnableAuthNegotiatePort and change its value to 1.
> Refresh the registry by selecting View > Refresh
> Verify the same string, value and keys exists on HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Policies\Google\Chrome .
> Exit Registry Editor and restart the computer.


For Firefox:
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This is still an unresolved bug in Firefox. It still does not include the port information in SPN sent in TGS request.
We will have to register a SPN for Spotfire Server without a port number, i.e. for default port.


For TIBCO Spotfire Analyst:
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> Open Windows Registry Editor (Run regedit.exe).
> Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl .
> Creat a new Key named "FEATURE_INCLUDE_PORT_IN_SPN_KB908209" .
> Create a new "DWORD Value" named "Spotfire.Dxp.exe" on the above key and changes its value to 1. You can also create a wildcard DWORD named "*" (asterisk) to match all clients.
> Exit Registry Editor and restart the computer.


For TIBCO Spotfire Web Player:
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> We will have to register a SPN for Spotfire Server without a port number, i.e. for default port.