Th0rgal

So what's the problem? The client just think that this is a forge server without any mods: there is no issue for the client.

how to do that?

I know that this isn't perfect but it allowed me to find a lot of cheaters so it's a really nice feature. What's the problem with faking forge handshake?

Hey everybody! I am the developer of a spigot plugin which allows to detect forge mods of a player. This is very useful because it allows to see when a player uses banned mods (like wurst forge for example). In order to do that I have to send a special packet (known as plugin message or PacketPkayOutCustomPayload) consisting of a String (the name of the channel) and a byte[] (the data contained in the message). Unfortunately since 1.13 this packet has changed and the channel is no longer a simple String but a MinecraftKey. This is not necessarily a problem because a MinecraftKey can be initialized from a String matching a certain regex ([^ a-z0-9 /_.-]+), the old channel being "FML|HS", the new theoretically would have been "fml:hs" or "fml:handshake", however neither of them works and I can not find any additional information on wiki.vg. If anyone can help me I would be very grateful to him, Thomas!