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# sudo apt install iptables
# sudo iptables -L # sudo iptables --list -n -v
# sudo iptables --list Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination
# sudo iptables -A INPUT -p tcp -m tcp --dport 80 -j ACCEPT
# iptables -A INPUT -p tcp -s 192.168.0.24/32 --dport 22 -j ACCEPT
# sudo apt list iptables-persistent # sudo apt install iptables-persistent
保存と、読み込み
# sudo /etc/init.d/netfilter-persistent save # sudo /etc/init.d/netfilter-persistent reload
$ sudo systemctl get-default graphical.target
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