Topology:
```
	     infrastructure  	 services
	    +---------------+ 	+---------------+	

		 ns					 ssh

	>--- gate				 openvpn

		 proxy				 nextcloud

							 ...
```


Options:
- `CT_GROUP=1000` (range: 1000-1999)
  Set the network base ID

- `CT_INFRASTRUCTURE=100..199`
  Set the infrastructure base id

- `CT_SERVICES=200..299`

- `CT_TEMPLATES=900..999`




<!-- vim:set ts=4 sw=4 : -->