Red Hat network

[derleader __]

Hi,


 I have a question about RHN. 



 I want to create a small network just like RHN and Oracle Unbreakable Network for private updates of several systems with serial key subscriptions. Where I can find how exactly RHN and up2date works. I know that they are GPL licensed and there is open source alternative to RHN - Spacewalk the missing key is how up2date and RHN works.

Regards