【iptables】自定义iptables系统服务

#  cat  /etc/iptables.rules

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# Generated by iptables-save v1.4.21 on Sun Oct 11 16:00:53 2020

*filter

:INPUT DROP [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 -s {{ ip }} --dport 22:65535 -j ACCEPT

-A INPUT -p udp -m state --state NEW -m udp -s {{ ip }} --dport 22:65535 -j ACCEPT

-A INPUT -j REJECT --reject-with icmp-host-prohibited

-A FORWARD -j REJECT --reject-with icmp-host-prohibited

COMMIT

# Completed on Sun Oct 11 16:00:53 2020

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注意：  /etc/iptables.rules文件中不能有空行

#  sed -i '/^\s*$/d' /etc/iptables.rules

# cat  /etc/systemd/system/iptables.service

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[Unit]

Description=iptables rules service

After=network.target

[Service]

Type=oneshot

ExecStart=/usr/sbin/iptables-restore  /etc/iptables.rules

ExecStop=/usr/sbin/iptables -P INPUT ACCEPT

ExecStop=/usr/sbin/iptables -F

RemainAfterExit=yes

[Install]

WantedBy=multi-user.target

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# systemctl daemon-reload

# systemctl  start      iptables.service

# systemctl  enable  iptables.service

# systemctl  status  iptables.service

# iptables -nvL --line