CLI tools to run on servers and check if the server configuration is ready for Dumper.
On your server, install the CLI:
$ gem install dumper-cli
And then execute:
$ dumper doctor
Then it will report if there's anything that needs to be fixed.
Checking IP address... 192.168.1.2 => Private IP, warning - remote fetch from dumper.io to this server will fail. You will need to use the dumper gem with rails.
Checking my.cnf... No bind-address defined in my.cnf => good
Checking server clock accuracy... 2017-11-06 17:39:59 (server time) vs 2017-11-06 17:39:59 (ntp time), diff: 0.009 seconds => good