You can configure an Access Gateway to use one public IP address to protect multiple types of web resources. This is one of the major benefits of Access Gateway, because it conserves valuable resources such as IP addresses. This feature also makes an Access Gateway a multi-homing device because it becomes a single endpoint supporting multiple back-end resources.
You can use one or multiple multi-homing methods. Select methods that meet the needs of your network and resources you are protecting. The first proxy service configured for a reverse proxy is always configured to use the DNS name of Access Gateway. You can configure subsequent proxy services domain-based multi-homing, path-based multi-homing, or virtual multi-homing.