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linux中某个端口拒绝远程主机连接原因及解决方法

March 26, 2018 • Read: 908 • linux阅读设置

问题描述:
比如在本机telent到192.168.8.170 主机的9000 端口,被拒绝。
[zhu@hadoop log]$ telnet 192.168.8.170 9000
Trying 192.168.8.170...
telnet: connect to address 192.168.8.170: Connection refused
原因:原因有两个

一个是被防火墙拦截
或者该端口的监听地址为本机(127.0.0.1),如果这样的话,只有从本机发起的对端口的访问被允许,而外部主机访问被拒绝。可以通过“`netstat -anp | grep 9000`”命令查看该端口的监听地址:
[zhu@hadoop log]$ netstat -anp | grep 9000 

(Not all processes could be identified, non-owned process info
will not be shown, you would have to be root to see it all.)
tcp 0 0 ::ffff:127.0.0.1:9000 :::* LISTEN 6614/java
tcp 0 0 ::ffff:127.0.0.1:46722 ::ffff:127.0.0.1:9000 TIME_WAIT -
tcp 0 0 ::ffff:127.0.0.1:46729 ::ffff:127.0.0.1:9000 TIME_WAIT -
tcp 0 0 ::ffff:127.0.0.1:46723 ::ffff:127.0.0.1:9000 ESTABLISHED 6733/java
tcp 0 0 ::ffff:127.0.0.1:46726 ::ffff:127.0.0.1:9000 TIME_WAIT -
tcp 0 0 ::ffff:127.0.0.1:46730 ::ffff:127.0.0.1:9000 ESTABLISHED 6976/java
tcp 0 0 ::ffff:127.0.0.1:9000 ::ffff:127.0.0.1:46730 ESTABLISHED 6614/java
tcp 0 0 ::ffff:127.0.0.1:9000 ::ffff:127.0.0.1:46723 ESTABLISHED 6614/java

有上图可知,9000端口监听的地址为本地地址(127.0.0.1)

解决方法:

如果防火墙过滤了访问该端口的请求则设置过滤规则,放行该端口或者关闭防火墙
如果监听地址为本机地址则修改其监听地址为真是ip地址(如192.168.8.119)。

比如在hadoop中,可以更改本机地址(eg:localhost——>hadoop),然后在/etc/hosts配置文件中加入主机hadoop和ip 192.168.8.119的映射关系,然后修改core-site.xml中fs.default.name的值为"hdfs://hadoop:9000"。

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最后编辑于: April 11, 2018