``` yum install -y telnet-server xinetd ``` ## 启动telnet ``` systemctl start telnet.socket && systemctl start xinetd.service ``` ``` echo 'pts/0' >> /etc/securetty echo 'pts/1' >> /etc/securetty ``` ## 防火墙放行 ``` firewall-cmd --zone=public --add-port=23/tcp --permanent ``` ## 重新加载防火墙 ``` firewall-cmd --reload ```