fix + required param

manifests/rules/out/munin.pp

@@ -3,9 +3,10 @@ class firewall::rules::out::munin {
   include firewall
   if $firewall::use_nftables {
     nftables::simplerule {
-      'munin-out':
+      'munin_out':
         chain => 'default_out',
-        dport => '4949',
+        dport => 4949,
+        proto => 'tcp',
     }
   } else {
     include shorewall::rules::out::munin