Everyone,
It is apparent that the epel version of denyhosts on Centos 7 which is denyhosts-2.9-4.el7.noarch does not resynch with :
SYNC_SERVER = http://xmlrpc.denyhosts.net:9911
According to :
https://www.centos.org/forums/viewtopic.php?f=51&t=56989
the problem is related to a version update problem in the epel repositories.
I submitted a bugzilla report :
https://bugzilla.redhat.com/show_bug.cgi?id=1502251
Greg Ennis