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  • CentOS7.4 关闭firewall防火墙,改用iptables

    1.关闭默认的firewall防火墙
    systemctl stop firewalld.service #停止firewall
    systemctl disable firewalld.service #禁止firewall开机启动
    firewall-cmd --state #查看默认防火墙状态(关闭后显示notrunning,开启后显示running)

    2.开启iptables

    yum install iptables (根据centOS7的版本和内核,有些版本已经装过,可以跳过此命令)
    yum install iptables-services
    service iptables restart
    chkconfig iptables on或者systemctl enable iptables.service开机自启

    3.编辑防火墙文件(开启了21,22,80,3306端口)
    vim /etc/sysconfig/iptables
     

    # sampleconfiguration for iptables service 
    # # you can edit thismanually or use system-config-firewall 
    # # please do not askus to add additional ports/services to this default configuration 
    *filter 
    :INPUT ACCEPT [0:0] 
    :FORWARD ACCEPT [0:0] 
    :OUTPUT ACCEPT [0:0] 
    -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 21 -j ACCEPT 
    -A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT 
    -A INPUT -p tcp -m state --state NEW -m tcp --dport 80 -j ACCEPT 
    -A INPUT -p tcp -m state --state NEW -m tcp --dport 3306 -j ACCEPT 
    -A INPUT -j REJECT --reject-with icmp-host-prohibited 
    -A FORWARD -j REJECT --reject-with icmp-host-prohibited 
    COMMIT 
    5.查看本机关于IPTABLES的设置情况

    iptables -L -n


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  • 原文地址:https://www.cnblogs.com/idjl/p/9610586.html
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