When i was playing alone, at first, a random guy just joined my server named “sergiucatinas” even though the ip was really hard to just guess or type randomly. But that was only the first time.
After that, I whitelisted the server to only my friends. But then,
Just a few minutes ago from posting this, a player with a red hoodie skin just joined and he had no nametag on his character. He joined while me and my friend was building our base. He joined even though the server was already whitelisted. I didnt see him directly but my friend said he has good building skills
Is there a fix to this? Is this a hacker problem? Or is it just aternos people checking in on servers, or monitoring the players chat? Please see this post admins, I really want an answer