I know hot to block single tumblr blog with
127.0.1.1 something.tumblr.com
but I want to block entire tumblr. I tried 127.0.1.1 tumblr.com but it's not working.
Is there a way to do this?
From Ubuntu 14.04 LTS (Trusty Tahr) and above, which already have NetworkManager and use dnsmasq by default you don't need to install it.
Just create a file /etc/NetworkManager/dnsmasq.d/local:
address=/tumblr.com/127.0.0.1
and reboot or restart NetworkManager
$ sudo service network-manager restart
This will block tumblr.com and all of its subdomains by redirecting it to localhost (127.0.0.1).
Note this won't do anything unless you also set up your connection to use localhost/dnsmasq for name resolution.
On older than Trusty versions install dnsmasq:
$ sudo apt-get install dnsmasq
Then in /etc/dnsmasq.conf (which you may have to create) add the line:
address=/tumblr.com/127.0.0.1
