mina 框架防攻击

最近在项目上用了Mina，服务端测试适用了一下黑名单；

在用一台电脑死循环连接服务器的时候，服务器的内存一会达到100%且报内存溢出；

服务端日志：

2016-12-05 10:58:50 [ NioProcessor-3:181674 ] - [ WARN ] Remote address in the blacklist; closing.
2016-12-05 10:58:50 [ NioProcessor-3:181674 ] - [ WARN ] Remote address in the blacklist; closing.
2016-12-05 10:58:50 [ NioProcessor-3:181674 ] - [ WARN ] Remote address in the blacklist; closing.
2016-12-05 10:58:50 [ NioProcessor-4:181674 ] - [ WARN ] Remote address in the blacklist; closing.
2016-12-05 10:58:50 [ NioProcessor-4:181674 ] - [ WARN ] Remote address in the blacklist; closing.
2016-12-05 10:58:50 [ NioProcessor-4:181674 ] - [ WARN ] Remote address in the blacklist; closing.
2016-12-05 10:58:50 [ NioProcessor-5:181674 ] - [ WARN ] Remote address in the blacklist; closing.
2016-12-05 10:58:50 [ NioProcessor-5:181674 ] - [ WARN ] Remote address in the blacklist; closing.

请问：服务端通过什么方式能防止对mina的恶意攻击？