if this utility interacts parrallel to the tcp wrapper host access control files and parrallell with the eth interface, I would have to guess to add a computer name into the /etc/hosts file.
Though Ive never used cPanel, you may be needing to add something in the /etc/resolv.conf file.
I dont' know, this is only a shot in the dark.
I don't see how an application would only report half a name if it in fact querying your servers instead of information on the local machine.
On the other hand, like I said, if it interacts with the local machine settings, I would check the files named above.