以前甲骨文开端口的方法都失效了吗？

我用的前几台小鸡用的好好的子网
apt-get purge netfilter-persistent
没用
[email protected]:~# rm -f /etc/iptables/rules.v4
[email protected]:~# rm -f /etc/iptables/rules.v6
没用
[email protected]:~# iptables -P INPUT ACCEPT
[email protected]:~# iptables -P FORWARD ACCEPT
[email protected]:~# iptables -P OUTPUT ACCEPT
[email protected]:~#  iptables -F
没用
重启好多次了
curl -IkL -m20 https://xxx.com
curl: (7) Failed to connect to xxx.com port 443: Connection refused