我以前有点问过这个。我已经建立了一个服务器来为我的网站、dns 和一些游戏服务器提供服务。但是，当我检查我的路由器防火墙日志时，我在同一端口上阻止了很多传入的 UDP 数据包。这是它的样子，请注意端口不正常，并且没有打开或使用。
[INFO] Sat Aug 25 21:25:09 2012 Blocked incoming UDP packet from 176.212.55.166:49001 to 84.234.160.79:61767
[INFO] Sat Aug 25 21:25:05 2012 Blocked incoming UDP packet from 186.227.20.17:21401 to 84.234.160.79:14953
[INFO] Sat Aug 25 21:25:05 2012 Blocked incoming UDP packet from 117.203.8.239:14090 to 84.234.160.79:14953
[INFO] Sat Aug 25 21:25:03 2012 Blocked incoming UDP packet from 77.35.1.215:49001 to 84.234.160.79:14953
[INFO] Sat Aug 25 21:24:53 2012 Blocked incoming UDP packet from 90.180.165.121:10011 to 84.234.160.79:61767
[INFO] Sat Aug 25 21:24:51 2012 …