These links are a good place to start
- https://www.ibm.com/developerworks/community/wikis/home?lang=en#!/wiki/Tivoli%20Endpoint%20Manager/page/Patch%20Management%20for%20Red%20Hat
- https://www.ibm.com/support/knowledgecenter/en/SS2TKN_9.1.0/com.ibm.tivoli.tem.doc_9.1/Patch_Man/Patch_Man_RH/c_troubleshooting.html
- https://www-01.ibm.com/support/docview.wss?uid=swg27048773&aid=1
- RedHat Patching
Only the Bigfix server needs access to RHN.