Let me preface everything with this: I have never worked with perl or yum before.
I tried to run a script for dynamic DNS host DNSExit:

# /usr/sbin/dnsexit-setup.pl

Can't locate Http_get.pm in @INC (@INC contains: /usr/local/lib64/perl5 /usr/local/share/perl5 /usr/lib64/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib64/perl5 /usr/share/perl5 .) at /usr/sbin/dnsexit-setup.pl line 9.

BEGIN failed--compilation aborted at /usr/sbin/dnsexit-setup.pl line 9.

The error says I'm missing the perl module, so I tried installing it:

# perl -MCPAN -e 'install HTTP::get'

Can't locate CPAN.pm in @INC (@INC contains: /usr/local/lib64/perl5 /usr/local/share/perl5 /usr/lib64/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib64/perl5 /usr/share/perl5 .).

BEGIN failed--compilation aborted.

Since cpan isn't present, I tried installing it:

# yum install perl-CPAN

Loaded plugins: clearcenter-marketplace, fastestmirror

ClearCenter Marketplace: fetching repositories...

Loading mirror speeds from cached hostfile

 * clearos: mirror2-houston.clearsdn.com

 * clearos-addons: mirror2-houston.clearsdn.com

 * clearos-extras: mirror2-houston.clearsdn.com

 * clearos-updates: mirror2-houston.clearsdn.com

 * private-clearcenter-dyndns: download4.clearsdn.com:80

Setting up Install Process

No package perl-CPAN available.

Error: Nothing to do

So what do I need to do at this point? Do I need to add/enable a repository? If so, what repository?