Hi I am running Redhat 7.0 has my mail server. Mail users can access the server by telnet. How to disable the telnet from email users They can only send & receive email Pls help me Thanks a lot in advance

edit /etc/passwd and replace the shell (/bin/bash) by something else ex: /dev/null also, you may edit user's .bash_profile and add an "exit" at the bottom.

A suggestion from www.wu-ftpd.org is to have an executable shell that does not allow login like this: #!/bin/sh # # ftponly shell # trap "/bin/echo Sorry; exit 0" 1 2 3 4 5 6 7 10 15 # IFS="" Admin=access@host.some.domain System=`/usr/ucb/hostname`@`/usr/bin/domainname` # /bin/echo /bin/echo "********************************************************************" /bin/echo " You are NOT allowed interactive access to $System." /bin/echo /bin/echo " User accounts are restricted to ftp and web access." /bin/echo /bin/echo " Direct questions concerning this policy to $Admin." /bin/echo "********************************************************************" /bin/echo # # C'ya # exit 0

i would disable telnet completely, since it is an insecure service