iptable是Linux自带的防火墙。CentOS系统镜像安装后默认没有开放80端口,如何编辑 iptable 规则来实现添加/删除。文章源自菜鸟学院-https://www.cainiaoxueyuan.com/yunwei/3797.html
查看当前iptable防火墙规则文章源自菜鸟学院-https://www.cainiaoxueyuan.com/yunwei/3797.html
# iptables -L -n文章源自菜鸟学院-https://www.cainiaoxueyuan.com/yunwei/3797.html
编辑规则文章源自菜鸟学院-https://www.cainiaoxueyuan.com/yunwei/3797.html
# vi /etc/sysconfig/iptables文章源自菜鸟学院-https://www.cainiaoxueyuan.com/yunwei/3797.html
出现如下(例子,部分会略有不同,只是讲述大概方法):文章源自菜鸟学院-https://www.cainiaoxueyuan.com/yunwei/3797.html
# Firewall configuration written by system-config-firewall文章源自菜鸟学院-https://www.cainiaoxueyuan.com/yunwei/3797.html
# Manual customization of this file is not recommended.文章源自菜鸟学院-https://www.cainiaoxueyuan.com/yunwei/3797.html
*filter文章源自菜鸟学院-https://www.cainiaoxueyuan.com/yunwei/3797.html
:INPUT ACCEPT [0:0]文章源自菜鸟学院-https://www.cainiaoxueyuan.com/yunwei/3797.html
:FORWARD ACCEPT [0:0]文章源自菜鸟学院-https://www.cainiaoxueyuan.com/yunwei/3797.html
:OUTPUT ACCEPT [0:0]文章源自菜鸟学院-https://www.cainiaoxueyuan.com/yunwei/3797.html
-A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT文章源自菜鸟学院-https://www.cainiaoxueyuan.com/yunwei/3797.html
-A INPUT -p icmp -j ACCEPT文章源自菜鸟学院-https://www.cainiaoxueyuan.com/yunwei/3797.html
-A INPUT -i lo -j ACCEPT文章源自菜鸟学院-https://www.cainiaoxueyuan.com/yunwei/3797.html
-A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT文章源自菜鸟学院-https://www.cainiaoxueyuan.com/yunwei/3797.html
-A INPUT -j REJECT --reject-with icmp-host-prohibited文章源自菜鸟学院-https://www.cainiaoxueyuan.com/yunwei/3797.html
-A FORWARD -j REJECT --reject-with icmp-host-prohibited文章源自菜鸟学院-https://www.cainiaoxueyuan.com/yunwei/3797.html
COMMIT文章源自菜鸟学院-https://www.cainiaoxueyuan.com/yunwei/3797.html
我们可以在22端口下添加80端口,如(按键盘 I 进入编辑模式):文章源自菜鸟学院-https://www.cainiaoxueyuan.com/yunwei/3797.html
-A INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT文章源自菜鸟学院-https://www.cainiaoxueyuan.com/yunwei/3797.html
以上例完成后完整的应该是:文章源自菜鸟学院-https://www.cainiaoxueyuan.com/yunwei/3797.html
# Firewall configuration written by system-config-firewall文章源自菜鸟学院-https://www.cainiaoxueyuan.com/yunwei/3797.html
# Manual customization of this file is not recommended.文章源自菜鸟学院-https://www.cainiaoxueyuan.com/yunwei/3797.html
*filter文章源自菜鸟学院-https://www.cainiaoxueyuan.com/yunwei/3797.html
:INPUT ACCEPT [0:0]文章源自菜鸟学院-https://www.cainiaoxueyuan.com/yunwei/3797.html
:FORWARD ACCEPT [0:0]文章源自菜鸟学院-https://www.cainiaoxueyuan.com/yunwei/3797.html
:OUTPUT ACCEPT [0:0]文章源自菜鸟学院-https://www.cainiaoxueyuan.com/yunwei/3797.html
-A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT文章源自菜鸟学院-https://www.cainiaoxueyuan.com/yunwei/3797.html
-A INPUT -p icmp -j ACCEPT文章源自菜鸟学院-https://www.cainiaoxueyuan.com/yunwei/3797.html
-A INPUT -i lo -j ACCEPT文章源自菜鸟学院-https://www.cainiaoxueyuan.com/yunwei/3797.html
-A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT文章源自菜鸟学院-https://www.cainiaoxueyuan.com/yunwei/3797.html
-A INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT文章源自菜鸟学院-https://www.cainiaoxueyuan.com/yunwei/3797.html
-A INPUT -j REJECT --reject-with icmp-host-prohibited文章源自菜鸟学院-https://www.cainiaoxueyuan.com/yunwei/3797.html
-A FORWARD -j REJECT --reject-with icmp-host-prohibited文章源自菜鸟学院-https://www.cainiaoxueyuan.com/yunwei/3797.html
COMMIT文章源自菜鸟学院-https://www.cainiaoxueyuan.com/yunwei/3797.html
按键盘Esc退出编辑模式,按Shift+:输入x回车,退出并保存。然后重启iptable使规则生效:文章源自菜鸟学院-https://www.cainiaoxueyuan.com/yunwei/3797.html
#service iptables restart文章源自菜鸟学院-https://www.cainiaoxueyuan.com/yunwei/3797.html