linux telnet安裝配置

linux telnet安裝配置 [root@Demo Packages]# rpm -ivh xinetd-2.3.14-33.el6.i686.rpmwarning: xinetd-2.3.14-33.el6.i686.rpm: Header V3 RSA/SHA256 Signature, key ID fd431d51: NOKEYPreparing...                ########################################### [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: NOKEYPreparing...                ########################################### [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 restartStopping xinetd:                                           [FAILED]Starting xinetd:                                           [  OK  ][root@Demo etc]# telnet 127.0.0.1Trying 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 i686login: rootPassword:Login incorrectlogin: adminPassword:Last login: Sun Mar 17 10:05:35 from 192.168.1.100[admin@Demo ~]$ su -Password:[root@Demo ~]# 使用root登入(預設root無法登陸)：[root@Demo etc]# mv securetty securetty.bak[root@Demo etc]# telnet 127.0.0.1Trying 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 i686login: rootPassword:Last login: Mon Mar 18 00:52:51 from 172.1.1.1[root@Demo ~]# 修改Telnet服務端的連接埠(預設為23)：[root@Demo etc]# vi /etc/servicestelnet          5023/tcptelnet          5023/udp[root@Demo etc]# telnet 127.0.0.1 5023Trying 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 i686login: