migrating from centos 6 problem

[rogeriojlle]

I'm not able to migrate from a Centos 6. The part that caught my attention in the XML file (which is directly accessible via curl) is a reference to a site outside Oracle

https://yum.oracle.com/repo/OracleLinux/OL6/UEK/latest/x86_64/repodata/repomd.xml: [Errno 14] problem making ssl connection
Trying other mirror.
Cannot retrieve repository metadata (repomd.xml) for repository: ol6_UEK_latest. Please verify its path and try again
Could not download the following packages from https://yum.oracle.com:
oraclelinux-release oraclelinux-release-el6 redhat-release-server

An error occurred while attempting to switch this system to Oracle Linux and it may be in an unstable/unbootable state. To avoid further issues, the script has terminated.
[root@centos6 ~]# curl https://yum.oracle.com/repo/OracleLinux/OL6/UEK/latest/x86_64/repodata/repomd.xml
<?xml version="1.0" encoding="UTF-8"?>
<repomd xmlns="http://linux.duke.edu/metadata/repo">
  <data type="other_db">

Loaded plugins: fastestmirror, presto
Loading mirror speeds from cached hostfile
https://yum.oracle.com/repo/OracleLinux/OL6/UEK/latest/x86_64/repodata/repomd.xml: [Errno 14] problem making ssl connection
Trying other mirror.
Cannot retrieve repository metadata (repomd.xml) for repository: ol6_UEK_latest. Please verify its path and try again
Could not download the following packages from https://yum.oracle.com:
oraclelinux-release oraclelinux-release-el6 redhat-release-server