1 files changed, 8 insertions, 0 deletions
diff --git a/lib/puppet/parser/functions/is_valid_domain_name.rb b/lib/puppet/parser/functions/is_valid_domain_name.rb
index c0b319c..99d6f86 100644
--- a/lib/puppet/parser/functions/is_valid_domain_name.rb
+++ b/lib/puppet/parser/functions/is_valid_domain_name.rb
@@ -12,6 +12,14 @@ module Puppet::Parser::Functions
         "given #{arguments.size} for 1")
     end
 
+    domain = arguments[0]
+
+    if domain =~ /^(([a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9])\.)*([A-Za-z0-9][A-Za-z0-9\-]*[A-Za-z0-9])\.?$/ then
+      return true
+    else
+      return false
+    end
+
   end
 end