[CentOS] source code location

[derleader __]

 >> >No, those are at ftp://ftp.redhat.com/redhat/linux/updates/enterprise/
 >>
 >> why there is no version 6? only 2, 3 and 4
 >
 >ftp://ftp.redhat.com/redhat/linux/updates/rhn/5Server/
 >
 >
 >I don't believe there are any updates for 6 yet, are there?
 >_______________________________________________
 >CentOS mailing list
 >CentOS at centos.org
 >http://lists.centos.org/mailman/listinfo/centos
 > 

Ok thank you everybody.
MY second question is about Red Hat Network. Is it 100% open source? The only code that I found is the source code of red hat network upstream project Spacewalk. http://spacewalk.redhat.com/source/1.2/RHEL/5/
I would like to see the source code of RHN if it's available?
 
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