What is the ROT parameter?

And why does one of the players have 0 0 0?
Also interested in the question of determining the country in the left margin, as it is being updated for a very long time. And if the server manager automatically determines the country, can I ban China, for example, indicating "China" in the host?

And why does one of the players have 0 0 0?
Also interested in the question of determining the country in the left margin, as it is being updated for a very long time. And if the server manager automatically determines the country, can I ban China, for example, indicating "China" in the host?