How to enable Telnet on Linux (RHEL3)

How to enable Telnet on Linux (RHEL3)

Though ssh is popular and secure for remote login, sometime telnet is also needed if you want to debug ssh on a remote machine.

 

Steps of enable telnet,

 

Edit and make sure /etc/xinetd.d/telnet looks like below, then backup /etc/securetty and restart xinetd service. and chkconfig it on make sure it will run when system reboot.

 

[root@ uftyolx01 ~]# cat /etc/xinetd.d/telnet

# default: on

# description: The telnet server serves telnet sessions; it uses \

#       unencrypted username/password pairs for authentication.

service telnet

{

        flags           = REUSE

only_from      = 192.168.8.0/24

        socket_type     = stream

        wait            = no

        user            = root

        server          = /usr/sbin/in.telnetd

        log_on_failure  += USERID

        disable         = no

}

[root@ uftyolx01 ~]#mv /etc/securetty /etc/securetty.bak

[root@ uftyolx01 ~]#/etc/init.d/xinetd restart

[root@ uftyolx01 ~]# chkconfig --level 35 telnet on

[root@ uftyolx01 ~]# chkconfig --list telnet

telnet          on