Configure RedHat telnet

Telnet is used in many systems. Today, we will explain how to configure the RedHat telnet service. Because RedHat AS3/4 uses os5 authentication, the default telnet service cannot perform root login. Therefore, you need to re-install the Security telnet-server for configuration. The specific steps are as follows:

Configure RedHat telnet Service 1. Download the secure telnet-server.

Configure RedHat telnet Service 2. Modify/etc/xinetd. d/telnet, change disable = yes to no, and then/etc/xinetd. d/disable = no in the krb5-telnet to yes (after the service is restarted, set according to the set value)

 
 

  
  
QUOTE:[root@ika xinetd.d]# cat /etc/xinetd.d/telnet  
  
  
# default: on  
  
  
# description: The telnet server serves telnet sessions; it uses \  
  
  
#       unencrypted username/password pairs for authentication.  
  
  
service telnet  
  
  
{  
  
  
disable = no 
  
  
flags           = REUSE 
  
  
socket_type     = stream 
  
  
wait            = no 
  
  
user            = root 
  
  
server          = /usr/sbin/in.telnetd  
  
  
log_on_failure  += USERID  
  
  
} 
 
 

Configure RedHat telnet Service 3. Modify the/etc/pam. d/login file and comment out the second line "auth required pam_securetty.so ".

 
 

  
  
QUOTE:[root@ika pam.d]# cat login  
  
  
#%PAM-1.0  
  
  
#auth      required    /lib/security/pam_securetty.so  
  
  
auth       required     /lib/security/pam_stack.so service=system-auth  
  
  
auth       required     /lib/security/pam_nologin.so  
  
  
account    required     /lib/security/pam_stack.so service=system-auth  
  
  
password   required     /lib/security/pam_stack.so service=system-auth  
  
  
session    required     /lib/security/pam_stack.so service=system-auth  
  
  
session    optional     /lib/security/pam_console.so 
 
 

Configure RedHat telnet Service 4, modify the/etc/securetty file, and add the login tty, such as pts/0, pts/1, pts/2 .......

 
 

  
  
QUOTE:[root@RN031 etc]# cat securetty  
  
  
pts/0  
  
  
pts/1  
  
  
pts/2  
  
  
vc/1  
  
  
vc/2  
  
  
vc/3  
  
  
vc/4 
 
 

Configure RedHat telnet service 5. restart xinetd: service xinetd restart.