forgot to add the class

global/overlay/etc/puppet/cosmos-rules.yaml

@@ -2,6 +2,7 @@
 # Note that the matching is done with re.match()
 .*\.sunet\.se$:
   net:
+  common:
   infra_ca_rp:
   sunet::nagios::nrpe:
     checks:
@@ -215,4 +216,4 @@ forum-sto3-prod-1.sunet.se:
 #             frontends:
 #              - 'sthb-lb-1.sunet.se'
 #              - 'tug-lb-1.sunet.se'
-#             port: '443'
+#             port: '443'