terco

Obstinate DNS

Terco is a DNS server that always resolves to 127.0.0.1.

It binds to port 53 by default, so probably you will have to sudo it. If you want to run it in a different port, pass the port number as the first argument.

One possible use is to configure your computer to resolve all requests for a given TLD to your own computer.

$ terco
Listening on port 53

Or, if you want to run it in the background:

$ terco &

Now you can tell your OS to use 127.0.0.1:53 as your DNS for a given TLD. Here's how to do it in OS X:

$ sudo mkdir /etc/resolver
$ sudo sh -c 'echo "nameserver 127.0.0.1" > /etc/resolver/dev'

Now all domains that use the .dev TLD will point to 127.0.0.1.

You can install it using rubygems.

$ gem install terco