Issue

yum shows

 'The certicate /usr/share/rhn/RHNS-CA-CERT is expired...'
certicate is expired try to use workflow with http instead of https and want yum update rhn*
packages are shown to update to version 1.0.0.-16.e16 but if i want to confirm to download I retrive: Error Downloading Packages:
  rhn-setup-1.0.0.1-16.el6.noarch: failed to retrieve getPackage/rhn-setup-1.0.0.1-16.el6.noarch.rpm from rhel-x86_64-server-6

Full history:

yum check-update
The certificate /usr/share/rhn/RHNS-CA-CERT is expired. Please ensure you have the correct certificate and your system time is correct.
serverURL=http://xmlrpc.rhn.redhat.com/XMLRPC

yum update "rhn*"
Loaded plugins: product-id, rhnplugin, security, subscription-manager
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
This system is receiving updates from RHN Classic or RHN Satellite.
Setting up Update Process
Resolving Dependencies
--> Running transaction check
---> Package rhn-check.noarch 0:1.0.0.1-8.el6 will be updated
---> Package rhn-check.noarch 0:1.0.0.1-16.el6 will be an update
---> Package rhn-client-tools.noarch 0:1.0.0.1-8.el6 will be updated
---> Package rhn-client-tools.noarch 0:1.0.0.1-16.el6 will be an update
---> Package rhn-setup.noarch 0:1.0.0.1-8.el6 will be updated
---> Package rhn-setup.noarch 0:1.0.0.1-16.el6 will be an update
--> Finished Dependency Resolution
Dependencies Resolved
Updating:
 rhn-check                                 noarch                          1.0.0.1-16.el6                           rhel-x86_64-server-6                           64 k
 rhn-client-tools                          noarch                          1.0.0.1-16.el6                           rhel-x86_64-server-6                          556 k
 rhn-setup                                 noarch                          1.0.0.1-16.el6                           rhel-x86_64-server-6                           97 k
Is this ok [y/N]: y
Downloading Packages:
Error Downloading Packages:
  rhn-setup-1.0.0.1-16.el6.noarch: failed to retrieve getPackage/rhn-setup-1.0.0.1-16.el6.noarch.rpm from rhel-x86_64-server-6
error was [Errno 14] Peer cert cannot be verified or peer cert invalid
  rhn-client-tools-1.0.0.1-16.el6.noarch: failed to retrieve getPackage/rhn-client-tools-1.0.0.1-16.el6.noarch.rpm from rhel-x86_64-server-6
error was [Errno 14] Peer cert cannot be verified or peer cert invalid
  rhn-check-1.0.0.1-16.el6.noarch: failed to retrieve getPackage/rhn-check-1.0.0.1-16.el6.noarch.rpm from rhel-x86_64-server-6
error was [Errno 14] Peer cert cannot be verified or peer cert invalid