Follow this steps
openssl genrsa -des3 -out elmaqu.es.key 1024
Now, you have the RSA PRIVATE, let’s create de CSR…
openssl req -new -key elmaqu.es.key -out elmaqu.es.csr
Don’t type additional password. Yum must fill all fields correctly.
Now, cat elmaqu.es.csr and pest on website