[svlug] Researchers ping through first full 'Internet census' in 25 years

[John Conover]

There are a lot of NAT'ed computers out there hiding behind Linux
routers, and the router's firewalls are usually programmed to DROP
unsolicited pings.

I doubt this study has much relevance:

    http://www.networkworld.com/community/node/20390?netht=101107dailynews2&&nladname=101107dailynews

Or, the press release:

    http://www.isi.edu/news/news.php?story=178

Interestingly, though, 61% of the IP addresses responded to pings.    

        John

BTW, Steve Gibson's on line port scanner is handy, (like when you use
someone else's computer, or in a coffee shop, etc.):

    https://www.grc.com/x/ne.dll?bh0bkyd2

and go to the bottom of the page, and proceed. Then scan all service
ports, etc. Its a pretty quick way to tell how good the IT staff that
runs the computer are, (and don't expect too good.)

-- 

John Conover, conover at rahul.net, http://www.johncon.com/