当我配置好redis的配置文件后、redis的主服务器正常启动并没有什么问题。但是当我启动redis的从服务器后，从服务器开始报错、出现下面这个问题。说从服务器连接主服务器被拒绝了。

出现这个问题是因为主服务器的bind绑定了本机ip导致。那样跨服务器ip的访问就会失效。从服务器访问主服务器的ip和端口时，主服务器发现6379端口绑定在了本机ip上，也就是说只有本机ip才能访问。外部请求会被过滤。

13469:S 31 Dec 18:10:30.472 * Connecting to MASTER hadoop01:6379
13469:S 31 Dec 18:10:30.473 * MASTER <-> SLAVE sync started
13469:S 31 Dec 18:10:30.475 # Error condition on socket for SYNC: Connection refused
13469:S 31 Dec 18:10:31.475 * Connecting to MASTER hadoop01:6379
13469:S 31 Dec 18:10:31.475 * MASTER <-> SLAVE sync started
13469:S 31 Dec 18:10:31.478 # Error condition on socket for SYNC: Connection refused
13469:S 31 Dec 18:10:32.477 * Connecting to MASTER hadoop01:6379
13469:S 31 Dec 18:10:32.477 * MASTER <-> SLAVE sync started
13469:S 31 Dec 18:10:32.481 # Error condition on socket for SYNC: Connection refused