Is a simple method of blocking a particular domain name or IP address set available

[Bret Busby]

Hello.

I am running UbuntuMATE 16.04.

Continuous Internet traffic is shown to be occurring.

Etherape shows it to involve a single domain name (llnw.net) and its
IP address set (117.121.253.xxx).

I have tried to add a rule to deny it, using the Ubuntu firewall
software available through the Control Centre, but it requires, and,
limits each rule to, a single port number (which I do not know how to
find, for the traffic).

Is a simple method of blocking a particular domain name or IP address
set available, so that I can deny access to this domain name and/or
its IP address set?

Searching for the problem, shows that it is an international problem,
with this particular domain name (it is one of its subdomians, that
applies to this particular problem for me; the geographical Australian
subdomain, in my particular case, and, similarly for other localised
subdomains, for people in other countries), but I can't figure how to
deny the access for the domain name.

It seems to me, to be spyware.

Thank you in anticipation.

-- 
Bret Busby
Armadale
West Australia
..............

"So once you do know what the question actually is,
 you'll know what the answer means."
- Deep Thought,
 Chapter 28 of Book 1 of
 "The Hitchhiker's Guide to the Galaxy:
 A Trilogy In Four Parts",
 written by Douglas Adams,
 published by Pan Books, 1992

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