diff --git a/otpgo/lua/MsgTypes.lua b/otpgo/lua/MsgTypes.lua
index 4238706..7a7ea74 100644
--- a/otpgo/lua/MsgTypes.lua
+++ b/otpgo/lua/MsgTypes.lua
@@ -5,4 +5,6 @@ CLIENT_HEARTBEAT =      52
 -- new toontown specific login message, adds last logged in, and if child account has parent acount
 CLIENT_LOGIN_TOONTOWN = 125
 
-CLIENT_DISCONNECT_GENERIC = 1
+CLIENT_DISCONNECT_GENERIC =     1
+CLIENT_DISCONNECT_RELOGIN =     100
+CLIENT_DISCONNECT_BAD_VERSION = 125
diff --git a/otpgo/lua/ToontownClient.lua b/otpgo/lua/ToontownClient.lua
index e5b24ba..8e70ad0 100644
--- a/otpgo/lua/ToontownClient.lua
+++ b/otpgo/lua/ToontownClient.lua
@@ -11,7 +11,33 @@ function receiveDatagram(client, dgi)
         client:handleHeartbeat()
     elseif msgType == CLIENT_DISCONNECT then
         client:handleDisconnect()
+    elseif msgType == CLIENT_LOGIN_TOONTOWN then
+        handleLoginToontown(client, dgi)
     else
         client:sendDisconnect(CLIENT_DISCONNECT_GENERIC, string.format("Unknown message type: %d", msgType), true)
     end
 end
+
+function handleLoginToontown(client, dgi)
+    local playToken = dgi:readString()
+    local version = dgi:readString()
+    local hash = dgi:readUint32()
+    local tokenType = dgi:readInt32()
+    local wantMagicWords = dgi:readString()
+
+    if client:authenticated() then
+        client:sendDisconnect(CLIENT_DISCONNECT_RELOGIN, "Authenticated client tried to login twice!", true)
+        return
+    end
+
+    -- Check if version and hash matches
+    if version ~= SERVER_VERSION then
+        client:sendDisconnect(CLIENT_DISCONNECT_BAD_VERSION, string.format("Client version mismatch: client=%s, server=%s", version, SERVER_VERSION), true)
+        return
+    end
+
+    if hash ~= DC_HASH then
+        client:sendDisconnect(CLIENT_DISCONNECT_BAD_VERSION, string.format("Client DC hash mismatch: client=%d, server=%d", hash, DC_HASH), true)
+        return
+    end
+end