Are you talking of Nginx logs ? I have this :
error.log :
2017/08/05 10:56:35 [error] 3280#0: *420 connect() failed (111: Connection refused) while connecting to upstream, client: 184.105.139.*, server: , request: "GET / HTTP/1.1", upstream: "https://195.154.174.*:7081/", host: "195.154.174.*"...