iptables -A INPUT -p tcp --dport 8000 -j ACCEPT
iptables -A INPUT -p tcp -s IP --dport 8000 -j ACCEPT
iptables-save > /etc/iptables.rules
vi /etc/network/if-pre-up.d/iptables #创建文件,添加以下内容,使防火墙开机启动
!/bin/bash
iptables-restore < /etc/iptables.rules
# chmod +x /etc/network/if-pre-up.d/iptables #添加执行权限
# iptables -L -n查看规则是否生效.
iptables -L INPUT --line-numbers | awk 'NR> 2 && $8!="" {print $1, $8}'
iptables -D INPUT 1
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