Scanning and Host Management : Discovery Scans : How a Discovery Scan Works : Ports Included in the Discovery Scan

Ports Included in the Discovery Scan
By default, the discovery scan includes the following set of port lists:
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In total, the discovery scan includes over 250 ports. The following table lists the ports that the are scanned during discovery:
5432-5433 postgresql
5520-5521 unassigned
10202-10203 unassigned
5631-5632 pcanywheredata
5900-5919 unassigned
7579-7580 unassigned
7787 popup-reminders
41523-41524 unassigned
9809-9815 unassigned
If you do not see the port that you want to scan, you can manually add the port to the discovery scan. For example, if you know that your company runs web servers with port 9998 open, you need to manually add port 9998 to the discovery scan. This ensures that the discovery scan includes every port that is potentially open.
If you want to scan all ports, you can specify 1-65535 as the port range. Keep in mind that a discovery scan that includes all ports can take several hours to complete.
If there is a port that you do not want to scan, you can exclude the port from the discovery scan. The discovery scan will not scan any ports on the excluded list. For example, if your company uses an application that runs on port 1234, and you do not want to affect the application’s performance, you can add the port to the excluded list