centos7安装telnet

今天搞了一个阿里云服务器，发现没有telnet服务，安之

百度了一个教程，贴上：  https://blog.csdn.net/u012259256/article/details/67639982

先检查是否安装: telnet-server和xinetd

rpm -qa telnet-server
rpm -qa xinetd

如果没有安装，则安装：

yum list |grep telnet

------->

telnet.x86_64                           1:0.17-60.el7                  @base    
dcap-tunnel-telnet.x86_64               2.47.10-5.el7                  epel     
libguac-client-telnet.x86_64            1:0.9.12-1.el7                 epel     
libtelnet.x86_64                        0.21-5.el7                     epel     
libtelnet-devel.x86_64                  0.21-5.el7                     epel     
libtelnet-utils.x86_64                  0.21-5.el7                     epel     
telnet-server.x86_64                    1:0.17-60.el7                  base 



yum list |grep xinetd

-------->

xinetd.x86_64                           2:2.3.15-13.el7                base



执行安装：

yum -y install telnet-server.x86_64

yum -y install telnet.x86_64

yum -y install xinetd.x86_64



设置开机启动：

systemctl enable xinetd.service

systemctl enable telnet.socket

开启service：

systemctl start telnet.socket

systemctl start xinetd



开启防火墙端口：

firewall-cmd --permanent --add-port=23/tcp

firewall-cmd --reload



tail -f /var/log/secure

报错：

Mar 28 18:09:47 localhost login: PAM 2 more authentication failures; logname= uid=0 euid=0 tty=pts/1 ruser= rhost=::ffff:10.102.45.38  user=root



vi /etc/securetty

添加

pts/0

pts/1

中途添加防火墙时报错： FirewallD is not running

这是防火墙没有启动，systemctl start firewalld