CentOS防火墙iptables安装及配置
时间:2015-03-15 01:54 来源:bluexp29 作者:bluexp29
安装
yum install iptables
配置
vim /etc/sysconfig/iptables
例如：
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
# web
-A INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT
# ftp
-A INPUT -m state --state NEW -m tcp -p tcp --dport 21 -j ACCEPT
# ssh
-A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
COMMIT
查看端口状态
/etc/init.d/iptables status
启动/停止/重启
service iptables start/stop/restart
(责任编辑：IT)
| 安装 yum install iptables 配置 vim /etc/sysconfig/iptables 例如： *filter :INPUT ACCEPT [0:0] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [0:0] -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT -A INPUT -p icmp -j ACCEPT -A INPUT -i lo -j ACCEPT # web -A INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT # ftp -A INPUT -m state --state NEW -m tcp -p tcp --dport 21 -j ACCEPT # ssh -A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT -A INPUT -j REJECT --reject-with icmp-host-prohibited -A FORWARD -j REJECT --reject-with icmp-host-prohibited COMMIT 查看端口状态 /etc/init.d/iptables status 启动/停止/重启 service iptables start/stop/restart (责任编辑：IT) |