방화벽 설정
# 80 port
sudo iptables -I INPUT 1 -p tcp --dport 80 -j ACCEPT
# 443 port
sudo iptables -I INPUT 1 -p tcp --dport 443 -j ACCEPT
# save
sudo netfilter-persistent save
# reload
sudo netfilter-persistent reload
# 80 port
sudo iptables -I INPUT 1 -p tcp --dport 80 -j ACCEPT
# 443 port
sudo iptables -I INPUT 1 -p tcp --dport 443 -j ACCEPT
# save
sudo netfilter-persistent save
# reload
sudo netfilter-persistent reload