nslookup e dig estão resolvendo o endereço, mas o erro de lançamento do programa ruby.
aqui está o rastreamento de pilha
10: from /usr/local/bundle/gems/rest-client-2.0.2/lib/restclient.rb:67:in 'get'
9: from /usr/local/bundle/gems/rest-client-2.0.2/lib/restclient/request.rb:52:in 'execute'
8: from /usr/local/bundle/gems/rest-client-2.0.2/lib/restclient/request.rb:145:in 'execute'
7: from /usr/local/bundle/gems/rest-client-2.0.2/lib/restclient/request.rb:715:in 'transmit'
6: from /usr/local/lib/ruby/2.5.0/net/http.rb:909:in 'start'
5: from /usr/local/lib/ruby/2.5.0/net/http.rb:920:in 'do_start'
4: from /usr/local/lib/ruby/2.5.0/net/http.rb:935:in 'connect'
3: from /usr/local/lib/ruby/2.5.0/timeout.rb:103:in 'timeout'
2: from /usr/local/lib/ruby/2.5.0/timeout.rb:93:in 'block in timeout'
1: from /usr/local/lib/ruby/2.5.0/net/http.rb:936:in 'block in connect'
/usr/local/lib/ruby/2.5.0/net/http.rb:939:in 'rescue in block in connect': Failed to open TCP connection to ******:80 (getaddrinfo: Try again) (SocketError)