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  • centos7.4 防火墙设置

    1.关闭默认的firewall防火墙

    1. 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.  

    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</span>
    3.编辑防火墙文件(开启了21,22,80,3306端口)
    vim /etc/sysconfig/iptables
     
    
     
    <span style="font-size:18px;"># 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
    

      

    centos 需要开启此防火墙!

    
    
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  • 原文地址:https://www.cnblogs.com/rianley/p/9636555.html
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