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? ? ? Yum install https://download.docker.com/linux/centos/7/x86_64/stable/Packages/docker-ce-selinux-17. 03.0. Ce-1. El7. Centos.noarch.rpmThe SYN flooding attack first appeared in 1996. At that time, Phrack magazine described this attack and implemented it in code [1]. This information was quickly applied to attack the mail and Telnet services of a network service provider (ISP) and caused downtime. CERT (Computer? Emergence? Response? Team) soon released a preliminary assessment and solution to this attack technology [2].As shown in the above figure, when ping 156 host, the PING command has not been responded to. It seems that our iptables rule has come into effect. The message sent by ping has not been accepted by 156 host at all, but has been discarded, so let alone any response. Well, we have successfully configured an iptables rule. It seems that we have already started.In general, for example, our equipment has a software failure and cannot start normally, for example, our equipment has forgotten its startup password, and the legendary White Apple, etc. Can be solved by this method. This is why I call him Invincible Rebrushing Mode ~Secondly, deliberate practice requires a teacher who can assign targeted homework. Seeing here, everyone may be discouraged. Is it so easy to find a teacher? When I first saw it, I also wanted to give up deliberate practice, but when I saw the following chapters, I added that teachers are not necessary and can learn by themselves, provided that they are self-disciplined and persistent.就在淮南彻底失守之前，桓楚得到了楚汉开战的消息。Updated 23 September