Cent OS 7.5开启telnet登录

title: Cent OS 7.5开启telnet登录 #标题tags: telnet #标签
date: 2020-06-20
categories: linux大杂烩 # 分类

用于记录下Cent OS 7.5开启telnet登录。

yum -y install telnet* xinetd
cat > /etc/xinetd.d/telnet << EOF
# default: yes    
# description: The telnet server servestelnet sessions; it uses \   
# unencrypted username/password pairs for authentication.  
service telnet         
{  
  flags = REUSE  
  socket_type = stream  
  wait = no  
  user = root  
  server =/usr/sbin/in.telnetd  
  log_on_failure += USERID  
  disable = no   
}
EOF
systemctl restart xinetd
ps -ef | grep xinetd
ss -lnput | grep -w 23
tcp    LISTEN     0      64       :::23                   :::*                   users:(("xinetd",pid=40820,fd=5))
# 移除securetty文件以便可以root远程登录（可选配置）
# 如果不移除此文件，也可以先以普通用户登录，登录后再切换至root
mv /etc/securetty{,.bak}
$ telnet 192.168.20.2    # 客户端使用telnet进行登录测试

登录阶段如下：