CentOS7 下安装telnet服务

# 安装 telnet 避免 ssh 无法登录

 

yum -y install xinetd telnet telnet-server  

　　

# 允许 root 账号登陆

 

vi /etc/securetty  

　　

# 末尾添加两行

 

pts/0  
pts/1  

　　

# 添加防火墙端口

vi /etc/sysconfig/iptables  
-A INPUT -p tcp -m state --state NEW -m tcp --dport 23 -j ACCEPT  

　　

# 重启服务关闭 firewalld

systemctl restart iptables  
systemctl disable firewalld  
systemctl stop firewalld  

　　

# 注册服务

systemctl enable telnet.socket  
systemctl start telnet.socket  
systemctl enable xinetd  
systemctl start xinetd