This question is about how to use ping properly:
The user is not asking:
- why a particular site does not respond to pings. The OP expected that it should, and that the problem is on the client machine. The OP was correct (though the problem was that the
pingcommand was being used incorrectly on the client machine).
- why a ping might not succeed in general.
- how to configure a non-Ubuntu system to respond to pings.
Instead, the question is about why a particular ping command produced a particular error. And the information that has been provided in comments actually answers the question (and should be given as an answer).
Can anyone explain why it is correct for this to have been closed as off-topic?
If not, I'd suggest it ought to be reopened.
It seems to me that this was closed because it appeared that the OP was asking why a particular site does not respond to pings. Since that's not really what the question is about, and it is instead about how to use Ubuntu's ping command, I recommend this be reopened.