I attempted to install one of the suggested Perl modules Authen::Libwrap from Webmin and encountered errors. The install script asks a number of questions that are answered along the way except for the last one:
(3) Central America
(5) North America
(7) South America
Select your continent (or several nearby continents) 
Sorry! since you don't have any existing picks, you must make a geographic selection.
Possible endless loop in output detected!
Other than that each preceding step of the process is fine.