Scanning from the tool page will have all the scan options displayed by default. When scanning from the /tools 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
- 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. If the host is not alive (ex. does not respond to ICMP requests) it will show zero open ports found.
Note: If the scanner does not find any open ports even though you know they are there, we recommend you re-run the scan with the option “Check if host is alive” disabled. This will skip host discovery and just start the port scan.