Is the computer in question able to access the internet at all? If not speak to your systems/network administrator. You've not told anything about the operating system in use, or the network to which it is connected. It could be something as simple as a firewall/proxy issue. The CPAN documentation covers this.

If it's intentional that this server has no internet access, you could create a minimal mirror of CPAN on a system which does have internet access, and transfer it to the other system via CD/DVD/USB. See minicpan for further details of this.

How do I post a question effectively? may be worth reading since you are new here.