[Condor-users] Why so many ports?

[Matt Baker <bakerspage@xxxxxxx>]

Hey,

I'm currently working to do some flocking between university  
campuses, and while I'm making progress understanding grid protocols  
like Condor-C, I have a couple questions:

* If you have two pools that you want to share jobs via Condor-C,  
what ports do I need to keep open between the two submit nodes (see  
below):

                    ||                               ||
                    ||                               ||
[ Condor Pool ]-[ schedd ] <- Condor-C (ports?) ->[ schedd ]-[ Condor  
Pool ]
                    ||                               ||
                    ||                               ||

* The Condor manual says each execute node needs at least 10 open  
ports.. what are these used for? I get that files need to be  
transferred, but why 10?

Thanks,

Matt Baker
University of Arkansas