How to overview all open ports for network assets?

To overview the vulnerabilities of an open port for a network asset, do the following. 

1. log in to Security Center.
2. Click on Asset Manager.
3. Click on the PORTS header.
4. Click on a certain vulnerability or click on Filter if you want to search for a specific filter.
   
5. Click on a port to overview:
   • ASSETS:  to overview the assets that have that port open.
   • Vulnerabilities: to overview the vulnerabilities that have been detected on that port.
6. Done.