Tuesday, August 28, 2012

How to setup Telnet server in RHEL

For this example we are using three systems one linux server one linux clients and one window clients. To complete these per quest of telnet server
    •  linux server with ip address 192.168.0.254 and hostname Server
    • A linux client with ip address 192.168.0.1 and hostname Client1
    • A windows xp system with ip address 192.168.0.2 and hostname Client2
    • Updated /etc/hosts file on both linux system
    • Running portmap and xinetd services
    • Firewall should be off on server
Four rpm are required to configure telnet server. telnet, telnet-server, portmap, xinetd check them if not found then install

rpm

Now check telnet, portmap, xinetd service in system service it should be on
 #setup
Select  System service from list
[*]portmap
[*]xinetd
[*]telnet 



Now restart xinetd and portmap service

service restart
To keep on these services after reboot on then via chkconfig command
chkconfig
After reboot verify their status. It must be in running condition
service status
Create a normal user named user1

On Linux client

ping from telnet server and run telnet command and give user name and password






On Window client

ping from telnet server and run telnet command
telnet
Give user name and password







How to enable root login from telnet server

On linux server open file securetty
securetty
In the end of file add pts/0 to enable one telnet session for root. if you need to open more telnet session for root and add morepts/1 pts/2 and so on.
editing in securetty
Now restart xinetd and portmap service
service restart




Verfiy from window by login from root
root login telnet



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