I read through the documentation on CAS clustering:
http://www.ja-sig.org/wiki/display/CASUM/Clustering+CAS#ClusteringCAS-references

And I have a few queestions.

1.  Can the clustering work over a WAN, where IP multicast is not avaialable? 
I'm thinking maybe if it works with JBOSS which relies on 
JGroups(http://jgroups.org/) which can do Multicast over a WAN.
However, I did not see any recipe or instructions on this.
2.  The instructions for clustering seem to cover the following versions:
CAS 3.0.6 or greater 
CAS 3.1.0 or greater 
CAS 3.2.0 or greater 

I'm wondering if the 3.2.0 instructions also apply to 3.3.1 (if anyone has had 
any success).

3.  Basically, my project is thinking of doing SSO with 3 websites we currently 
run on separate domains, but eventually we plan to mirror one of the sites 
across a WAN, but still try and make sure SSO works.  Note: the websites 
currently are written in PHP and deployed under Apache webserver and not sure 
if that really has an affect on anything.

Note: this link w/i the documentation is bad: 
http://www.ja-sig.org/products/cas/server/cluster/index.html

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