install

yum install openssh openssh-server
yum install policycoreutils-python
yum install vim-enhanced -y
yum install net-tools

conf sshd

vim /etc/ssh/sshd_config

Port 2222
PermitRootLogin yes

semanage port -a -t ssh_port_t -p tcp 2222
systemctl restart sshd.service

firewall

firewall-cmd -—permanent —-zone=public —-add-port=2222/tcp
firewall-cmd —-reload

SSH Key

mkdir -p .ssh;
exit;

cat .ssh/id_rsa.pub | ssh root@192.168.183.50 'cat >> .ssh/authorized_keys'

ssh -p 2222 root@192.168.183.50
chmod 700 .ssh;
chmod 640 .ssh/authorized_keys

vim /etc/ssh/sshd_config
PermitRootLogin no