OpenVAS for my home network

I have been playing with OpenVAS now and then for a few years now.  I thought I would try it on my own network to see what I could find.  I had set up the system before (covered here), so I simply ran openvas-feed-update and navigated over to the main page in Iceweasel, as in the following picture:

After clicking on the 'Start Scan' button, I was treated to this view:

I clicked on 'Scan Management --> Reports' to see the result, as here:

In the picture above, you can see the worst result is the result in the 'Security' field.

Taking a look at the report:

We can see there is one host responsible for most of the flaws, while a 'TCP timestamps' flaw is seen on four other hosts.  The host with IP address 192.168.1.24 is my Cisco switch.  I may go on a separate quest to see if I can squash these flaws.  But, for now, they can stay.  On, and TCP timestamps? One is my small router, one is a printer, one is my Mac Mini, and one is my iPhone.