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Apache reverse proxy to Domino (CAC Authentication)

Posted on 2011-09-10
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Last Modified: 2012-05-12
I am very new to both Apache and Domino.  I have been tasked with using an Apache front end to pass SSL traffic to our back end domino server for CAC authentication for our users.  I have been able to successfully proxy a client through to Domino, however the request does not maintain the CAC header information.

So effectively what I am trying to do is:

client -------> Apache -------->Domino  (443 all the way through)

I realize that when doing this it acts as 2 separate SSL transactions and to deal with that I am trying to use mod_header in apache to pass the CAC information.  When doing this I keep receiving this error:

"Proxy client certificate callback downstream server wanted client certificate but none are configured"

I have tried some of the other solutions on these forums but still nothing is working.  Any help is greatly appreciated.

Thank you!!
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Question by:ThatNewGuy
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Expert Comment

by:doninja
ID: 36528452
If you are providing SSL on the apache then the connection to domino does not need to also be SSL encrypted as it will loose information as you are finding.
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Author Comment

by:ThatNewGuy
ID: 36529807
Donin, Thank you for the response :)

Unfortunately I have also tried that route but according to IBM support SSL must be enabled on Domino to allow for CAC authentication so I have to configure it this way :(
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Accepted Solution

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ThatNewGuy earned 0 total points
ID: 36956535
As a follow up to my question I ultimately found that this is impossible with the setup I want.  Domino does not allow for private key export.  In order to maintain a SSL connection through the proxy to the backend server that private key information is needed by the Apache server.  Without that information Apache will not create the second SSL connection between itself and the backend, which is necessary to carry the CAC credentials forward.

Hopefully if anyone else attempts to do this, they find this information useful.
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Author Closing Comment

by:ThatNewGuy
ID: 36978200
I found the solution; therefore I posted it so that others who may need this information have it and then I accepted it as my answer.
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