8 五 2012
what does tcp treason uncloaked mean
These days there were many logs like “TCP: Treason uncloaked! Peer 188.8.131.52:3852/80 shrinks window 2170780191:2170785823. Repaired.” in kern.log on mirror.bjtu.edu.cn. There is an explanation about this on serverfault. In short, it is an infomative message, seems that it is a problem on the client, namely the client decided to shrink the TCP window size without negotiating with the server. However, in older versions of linux, the messages may be incorrently printed by a bug. There is a patch about modifying the message content. For more information, see here.