linux telnet安装配置

linux telnet安装配置

 

[root@Demo Packages]# rpm -ivh xinetd-2.3.14-33.el6.i686.rpm

warning: xinetd-2.3.14-33.el6.i686.rpm: Header V3 RSA/SHA256 Signature, key ID fd431d51: NOKEY

Preparing...                ########################################### [100%]

   1:xinetd                 ########################################### [100%]

[root@Demo cdrom]# rpm -ivh telnet-

telnet-0.17-47.el6.i686.rpm         telnet-server-0.17-47.el6.i686.rpm

[root@Demo cdrom]# rpm -ivh telnet-*

warning: telnet-0.17-47.el6.i686.rpm: Header V3 RSA/SHA256 Signature, key ID fd431d51: NOKEY

Preparing...                ########################################### [100%]

   1:telnet-server          ########################################### [ 50%]

   2:telnet                 ########################################### [100%]

[root@Demo Packages]# cd /etc/xinetd.d/

[root@Demo xinetd.d]# vi telnet

# default: on

# description: The telnet server serves telnet 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

}

[root@Demo xinetd.d]# service xinetd restart

Stopping xinetd:                                           [FAILED]

Starting xinetd:                                           [  OK  ]

[root@Demo etc]# telnet 127.0.0.1

Trying 127.0.0.1...

Connected to 127.0.0.1.

Escape character is '^]'.

Red Hat Enterprise Linux Server release 6.2 (Santiago)

Kernel 2.6.32-220.el6.i686 on an i686

login: root

Password:

Login incorrect

login: admin

Password:

Last login: Sun Mar 17 10:05:35 from 192.168.1.100

[admin@Demo ~]$ su -

Password:

[root@Demo ~]#

 

使用root登录(默认root无法登陆)：

[root@Demo etc]# mv securetty securetty.bak

[root@Demo etc]# telnet 127.0.0.1

Trying 127.0.0.1...

Connected to 127.0.0.1.

Escape character is '^]'.

Red Hat Enterprise Linux Server release 6.2 (Santiago)

Kernel 2.6.32-220.el6.i686 on an i686

login: root

Password:

Last login: Mon Mar 18 00:52:51 from 172.1.1.1

[root@Demo ~]#

 

修改Telnet服务端的端口(默认为23)：

[root@Demo etc]# vi /etc/services

telnet          5023/tcp

telnet          5023/udp

[root@Demo etc]# telnet 127.0.0.1 5023

Trying 127.0.0.1...

Connected to 127.0.0.1.

Escape character is '^]'.

Red Hat Enterprise Linux Server release 6.2 (Santiago)

Kernel 2.6.32-220.el6.i686 on an i686

login: