CentOS防火墙设置开启80端口访问

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CentOS防火墙设置开启80端口访问

我们以添加80端口为例操作如下:

[root@centos httpd]# /sbin/iptables -I INPUT -p tcp --dport 80 -j ACCEPT

保存

[root@centos httpd]# /etc/rc.d/init.d/iptables save

iptables:将防火墙规则保存到 /etc/sysconfig/iptables: [确定]

如果上面的步骤还没好的话,可能是这个iptables文件使用的是包含调用。

一般的在/etc/sysconfig/iptables这个路径上

或者使用vi打开这个文件修改手动添加。

[root@centos httpd]# vi /etc/sysconfig/iptables

# Generated by iptables-save v1.4.7 on Tue Feb 14 07:32:18 2012
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [7:640]
-A INPUT -p tcp -m tcp --dport 10000 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 80 -j ACCEPT
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
COMMIT
# Completed on Tue Feb 14 07:32:18 2012

重新启动服务

[root@centos httpd]# service iptables restart
iptables:清除防火墙规则: [确定]
iptables:将链设置为政策 ACCEPT:filter [确定]
iptables:正在卸载模块: [确定]
iptables:应用防火墙规则: [确定]

查看端口是否生效:

[root@centos httpd]# /etc/init.d/iptables status

表格:filter
Chain INPUT (policy ACCEPT)
num target prot opt source destination
1 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:10000
2 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:80
3 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 state RELATED,
4 ACCEPT icmp -- 0.0.0.0/0 0.0.0.0/0
5 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0
6 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp
7 REJECT all -- 0.0.0.0/0 0.0.0.0/0 reject-with ic

Chain FORWARD (policy ACCEPT)
num target prot opt source destination
1 REJECT all -- 0.0.0.0/0 0.0.0.0/0 reject-with ic

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

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