Spam in my log; connection lost

My server always gives that message, it cant be a player who tries to connect because it would tell him he isnt whitelisted.

This is my log:

Code:

2012-04-01 15:02:55 [INFO] /194.169.211.98:47533 lost connection
2012-04-01 15:04:55 [INFO] /94.231.109.47:58811 lost connection
2012-04-01 15:07:28 [INFO] /194.169.211.98:58139 lost connection
2012-04-01 15:09:30 [INFO] /194.169.211.98:33759 lost connection
2012-04-01 15:14:43 [INFO] /94.231.109.47:42569 lost connection
2012-04-01 15:23:08 [INFO] /194.169.211.98:34616 lost connection
2012-04-01 15:26:00 [INFO] /94.231.109.47:55429 lost connection
2012-04-01 15:34:57 [INFO] /94.231.109.47:37366 lost connection
2012-04-01 15:36:26 [INFO] /194.169.211.98:33885 lost connection
2012-04-01 15:38:01 [INFO] /85.131.147.252:40339 lost connection
2012-04-01 15:40:58 [INFO] /194.169.211.98:42889 lost connection
2012-04-01 15:41:28 [INFO] /194.169.211.98:43837 lost connection
2012-04-01 15:42:29 [INFO] /194.169.211.98:45769 lost connection

Thanks for your help.

~G4meM0ment

 

Could be a player with an out-dated or cracked client

 

It's only a server check by nitrado.net or minecraftserver.eu