if ($cidr =~ m@^(dc/|guest/)?(${PVE::Firewall::ip_alias_pattern})$@) {
my $scope = $1 // "";
my $alias = $2;
+ # on the cluster level
+ $cluster_conf = $fw_conf if (!$cluster_conf);
# make sure alias exists (if $cidr is an alias)
PVE::Firewall::resolve_alias($cluster_conf, $fw_conf, $alias, $scope);
} else {