Scanning from the tool page will have all the scan options displayed by default. When bulk scanning from the /targets page, you need to click show in order to display the scan options:
- Common list of ports, either OpenVAS default or the TCP or UDP Default – Top 10, 100, 1000, 5000 ports (see here which ones)
- Specify the Range of ports you want to test (ex: 1 - 65535)
- Provide a List of ports
Please note that the scanner first attempts to detect if the host is alive or not before doing the port scan. Read here for more details on how we determine if the host is alive.