Issue

• yum update が失敗し、以下のエラーが表示されます。

# yum update
Loaded plugins: product-id, refresh-packagekit, rhnplugin, security, subscription-manager  
Updating certificate-based repositories.  
https://cdn.redhat.com/content/dist/rhel/server/6/6Server/x86_64/os/repodata/repomd.xml:[Errno 14] PYCURL ERROR 22 - "The requested URL returned error:403"  
Trying other mirror.  
Setting up Update Process  
No Packages marked for Update  
# yum install gcc  
Loaded plugins: product-id, refresh-packagekit, rhnplugin, security, subscription-manager  
Updating certificate-based repositories.  
https://cdn.redhat.com/content/dist/rhel/server/6/6Server/x86_64/os/repodata/repomd.xml:[Errno 14] PYCURL ERROR 22 - "The requested URL returned error:403"  
Trying other mirror.

• yum コマンドが失敗し、[Errno 14] PYCURL ERROR 22 - "The requested URL returned error: 403 Forbidden"" エラーが発生します。
• RHN classic にシステムが登録されており、その間はプロキシーが使用されています。パッケージをインストールすると次のエラーが発生します。

# yum update
Loaded plugins: product-id, rhnplugin, security
This system is receiving updates from RHN Classic or RHN Satellite.
Setting up Update Process
https://cdn.redhat.com/content/dist/rhel/server/6/6Server/x86_64/os/repodata/repomd.xml:[Errno 14] PYCURL ERROR 22 - "The requested URL returned error:403"
Trying other mirror.
Error:Cannot retrieve repository metadata (repomd.xml) for repository: rhel-6-server-rpms.Please verify its path and try again