If you have a dns server are these IP.1 = 192.168.194.130, DNS.1 = graylog.localhost reachable of the network?
If not you can add then to your hosts file on the Graylog server.
To be honest its not the software, it the configurations made. Need to know how all three parts work together first. The HTTPS configuration are pretty hard to get , but once you understand its a lot easier. When I first started it was a mess for weeks.
These posts help me to understand how TCP/TLS works with Graylog and how to create self-signed certificates. perhap looking over them they may help.