So, in my ChatServer, I write:
...
IPAddress ip(192,168,1, 77);
IPAddress gateway(192,168,1, 77);
IPAddress subnet(192, 168, 1, 77);
...
and in my ChatClient, I write:
...
IPAddress ip(192,168,1,77);
// Enter the IP address of the server you're connecting to:
IPAddress server(1,1,1,1);
...
am I right?