I've been keeping an eye on some of the players who send InitialHandlers to my server. I noticed one of them sends a packet, and the console gives me a warning of bad packet. Code (Text): 20:13:19 [INFO] [/-IP ADDRESS-] <-> InitialHandler has connected 20:13:19 [WARNING] [/-IP ADDRESS-] <-> InitialHandler - bad packet ID, are mods in use!? Unsupported protocol I tried googling this and got no results except for players getting kicked with this reason. Does this mean they are using a hacked client? Modded client? I'd like some more info on this. Thanks.