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Cannot login when mods used


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I'm trying to build my first Minecraft server, but now I'm quite confused with all the versions,  bukkit vs forge or both.. and I've read so much documentations my brain will blow.

I think I'm almost finished the server but I can't use the mods properly. Could you guys help me?


This is what I tried this time:


1. I installed minecraft_server.1.7.2 to my Ubuntu server ( nogui ).

2. I started the server, everything was fine.

3. Then I installed forge-1.7.2-

4. I started the server again it run nicely.

5. Then I coppied a mod ( http://www.curse.com/mc-mods/minecraft/mapwriter ) to the mods folder.


I started the server but when I tried to join with a client I got the following error:

  [18:46:07] [Netty IO #0/INFO] [FML]: Unexpected packet during modded negotiation - assuming vanilla or keepalives : net.minecraft.network.play.client.C00PacketKeepAlive


I've read that support for vanilla clients to connect to modded servers is not available.

Can you tell me what is the correct way to create a modded server?


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