What to do if Telnet is not working for Root, How to telnet as Root user ?

In our lab we need to run telnet using root. Well in real environment its not good idea but for lab purpose we wanted it. Even though we enabled Telnet server and on local PC the telnet was working, remotely it was not allowing. After some online "googling"  the issue got resolved by commenting following line in remote file:

 open :  vi /etc/pam.d/remote

 comment
#auth       required    pam_securetty.so