Server offline on ListPing

Hey,
today I found this in my list of servers:
I wonder how they created that "offline" sign in front of the connection thingi. It looks like faking something, because when I hover the red connection stuff, it's displaying that the version out of date is... Maybe somebody knows how they did this.
Edit: I think they are faking the version of the server but how?

 

serverListPing event with some packets maybe?

 

tommycake50 Assult Nope already checked packets! There is a listping packet but the only thing which you can set is a byte which you can't really set because it's always 1.

 

So how does the client get the data? .
is the wiki.vg protocol spec just missing a packet or two?

 

tommycake50 Nope the packet is in the wiki.vg protocol site! But it is not very helpfull

 

Ohh i saw the server list ping packet but it said it was only client to server which seemed really odd, because obviously the server sends a response. am i missing that packet? i didn't see it.

 

The server answeres on the server list ping packet using a kick disconnect packet. You can listen for the packet, check if the kick message contains the server list information, and modify them. (For example using ProtocolLib)
Packet info: http://wiki.vg/Server_List_Ping#Server_-.3E_Client

If you want to display a custom string (like the "Offline" in your picture), you have to modify the sent protocol version, so the client will display "Client out of date" or "Server out of date", and modify the minecraft version in the packet to your string.

You can't join the server through your server list if you change the protocol version, however it's still possible to connect to the server using the direct connect button.

 

Like you can see here: http://wiki.vg/Server_List_Ping the server responses with a modified kick packet.

 

phips99
Codename_b might know the answer since he is a dev for hypixel's server.

 

I haven't used this, but it seems to do what you want

 

Tested and approved by Raino! (Tested in 1.5)

 

We're using MCSignOnDoor