Centos Linux 开启端口 - 解决Centos发布服务外网访问不了的问题

#   -------------- 查看服务器端口状态--------------------
[root@zjxl-2 etc]#/etc/init.d/iptables status
Table: filter
Chain INPUT (policy DROP)
num  target     prot opt source               destination
1    ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0
2    ACCEPT     icmp --  0.0.0.0/0            0.0.0.0/0
3    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp dpt:22
4    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           multiport dports 20:30,80,110,443,3300:3500,5700:6100,7001,8000:13000
5    ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0           state RELATED,ESTABLISHED

Chain FORWARD (policy ACCEPT)
num  target     prot opt source               destination

Chain OUTPUT (policy ACCEPT)
num  target     prot opt source               destination


# ----------------------------发现没有开启6379和6380端口--------------------------------
# ----------------------------------开启6379端口---------------------------------

[root@zjxl-2 etc]# /sbin/iptables -I INPUT -p tcp --dport 6379 -j ACCEPT
[root@zjxl-2 etc]# /etc/init.d/iptables status
Table: filter
Chain INPUT (policy DROP)
num  target     prot opt source               destination
1    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp dpt:6379
2    ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0
3    ACCEPT     icmp --  0.0.0.0/0            0.0.0.0/0
4    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp dpt:22
5    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           multiport dports 20:30,80,110,443,3300:3500,5700:6100,7001,8000:13000
6    ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0           state RELATED,ESTABLISHED

Chain FORWARD (policy ACCEPT)
num  target     prot opt source               destination

Chain OUTPUT (policy ACCEPT)
num  target     prot opt source               destination


# ----------------------------------开启6380端口---------------------------------


[root@zjxl-2 etc]# /sbin/iptables -I INPUT -p tcp --dport 6380 -j ACCEPT



#   ------------------------------ 查看服务器端口状态---------------------------
[root@zjxl-2 etc]# /etc/init.d/iptables status
Table: filter
Chain INPUT (policy DROP)
num  target     prot opt source               destination
1    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp dpt:6380
2    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp dpt:6379
3    ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0
4    ACCEPT     icmp --  0.0.0.0/0            0.0.0.0/0
5    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp dpt:22
6    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           multiport dports 20:30,80,110,443,3300:3500,5700:6100,7001,8000:13000
7    ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0           state RELATED,ESTABLISHED

Chain FORWARD (policy ACCEPT)
num  target     prot opt source               destination

Chain OUTPUT (policy ACCEPT)
num  target     prot opt source               destination


# ----------------------------------保存修改配置 ---------------------------------


[root@zjxl-2 etc]# /etc/rc.d/init.d/iptables save
Saving firewall rules to /etc/sysconfig/iptables:          [  OK  ]
[root@zjxl-2 etc]#

 

 

问题描述：

        在Centos服务器上装好Redis缓存服务后，其他机器访问不了，提示连接超时。,郁闷,在网上找到解决方案：

    /sbin/iptables -I INPUT -p tcp --dport 6379  -j ACCEPT
     /sbin/iptables -I INPUT -p tcp --dport 6380 -j ACCEPT

然后保存：

    /etc/rc.d/init.d/iptables save

这样重启计算机后,CentOS防火墙默认已经开放了6379和6380端口。

这里应该也可以不重启计算机：

    /etc/init.d/iptables restart

 

查看CentOS防火墙信息：

    /etc/init.d/iptables status

关闭CentOS防火墙服务：

    /etc/init.d/iptables stop

永久关闭：

   chkconfig –level 35 iptables off

解决方案来源：http://hi.baidu.com/xiyi2008/item/345215b90948c4d085dd7978