To enable direct telnet for root account on redhat linux enterprise servers ( i have done wthis on RHEL3 and RHEL4 without any issues ) over the network :
under /etc/ directory edit /etc/securetty file and add pts entries :
or Just remove /etc/securetty file alltogether , i prefer moving /etc/securetty it.
mv /etc/securetty /etc/securetty.sav
Bingo root telnet is enabled now … on redhat enterprise Linux 4 .That’s all you need to do to enable telnet access for root account on Linux servers. Root access is activated right away you don’t need to restart any services on redhat linux .
Warning : telnet is not secure and you should be using SSH only for logins on RHEL4.Keep reading redhatcert blog to find out how to enable SSH logins on redhat enterprise Linux 4.