Added puppetlabs-firewall (required by puppetlabs-postgresql), updated the other modules.

modules/firewall/manifests/init.pp

@@ -0,0 +1,36 @@
+# = Class: firewall
+#
+# Manages packages and services required by the firewall type/provider.
+#
+# This class includes the appropriate sub-class for your operating system,
+# where supported.
+#
+# == Parameters:
+#
+# [*ensure*]
+#   Ensure parameter passed onto Service[] resources.
+#   Default: running
+#
+class firewall (
+  $ensure = running
+) {
+  case $ensure {
+    /^(running|stopped)$/: {
+      # Do nothing.
+    }
+    default: {
+      fail("${title}: Ensure value '${ensure}' is not supported")
+    }
+  }
+
+  case $::kernel {
+    'Linux': {
+      class { "${title}::linux":
+        ensure => $ensure,
+      }
+    }
+    default: {
+      fail("${title}: Kernel '${::kernel}' is not currently supported")
+    }
+  }
+}