1vim /etc/ssh/sshd_config
2
3PermitRootLogin yes
4PasswordAuthentication yes
5
6systemctl restart sshd.service

1systemctl stop rpcbind
2systemctl stop rpcbind.socket
3systemctl disable rpcbind
4systemctl disable rpcbind.socket 

1systemctl stop oracle-cloud-agent
2systemctl disable oracle-cloud-agent
3systemctl stop oracle-cloud-agent-updater
4systemctl disable oracle-cloud-agent-updater

1systemctl stop firewalld.service
2systemctl disable firewalld.service

1iptables -P INPUT ACCEPT
2iptables -P FORWARD ACCEPT
3iptables -P OUTPUT ACCEPT
4iptables -F

1apt-get purge netfilter-persistent
2reboot