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We are running Sentinel under Apache/Tomcat on Debian.  Most of our problems 
were related to getting the correct keys in the correct locations, but it has 
been working relatively well for several years now.  We role our own apache 
and tomcat though, instead of using the distribution installs because Debian, 
though not as bad as red hat, likes to modify the configuration (distributing 
install throughout the OS instead of keeping it separate which we prefer).  
If you have the time and inclination I might suggest downloading Apache/PHP 
and building your own to see if you can get that to work, and then try 
diffing the configurations with the red hat install to see if you can isolate 
any offending configurations etc.  At least then you can determine if it is a 
Red Hat specific issue.

Are you getting errors in your logs?  If I understand Sentinel correctly, what 
happens (at least from a tomcat point of view) is that upon redirect to your 
server after user authentication, the token is passed to your server which 
would then make an rpc call to the sentinel service to retrieve the 
credentials using the provided token.  If you have a firewall setup, it could 
be blocking the rpc calls, though i would expect that to appear in an error 
log somewhere.  I would suppose that it is also possible that the Sentinel 
client is being sandboxed, or prohibited from establishing an outbound 
connection to the Sentinel service.  I haven't used PHP for this however, so 
I don't know how it may differ.

Chris.


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Christopher C. Perry
GIS Coordinator
Campus Planning and Administration
412 Olds Hall

Phone: (517) 355-9582 Ext. 112
Fax: (517) 432-1090
Email: [log in to unmask]