Why can't my HTTP proxy connect to the Red Hat servers?

If the REDHAT_PACKAGE_MIRROR_LOCATION value is misconfigured, then you receive an error similar to the following message.

[root@user-c55ppnc10v3kufi8lth0-good-proxy-oc-4 ~]# yum install curl
Loaded plugins: product-id, search-disabled-repos, subscription-manager

https://rhncapdal1001.service.networklayer.com/pulp/repos/customer/Library/content/dist/rhel/server/7/7Server/x86_64/devtools/1/os/repodata/repomd.xml: [Errno 14] curl#60 - "Peer's Certificate issuer is not recognized."
Trying other mirror.
It was impossible to connect to the Red Hat servers.

This message indicates that the system is unable to find the package mirrors.

Double-check your configuration. For more information, see Configuring an HTTP proxy for your Satellite hosts.