Enable or Disable telnet to user in AIX
telnet is one of the remote access tool to login to UNIX / Linux
Operating System. AIX offers configuration of telnet to either enable or
disable the user remote telnet access to Operating System.
Enable telnet
Login as root user and edit the file vi /etc/inetd.conf and then remove the # from the line as given below
#telnet stream tcp6 nowait root /usr/sbin/telnetd telnetd -a
after removing # comment from save and exit the file. Note that the change should be done using the root user else it will throw error ex: 0602-065 The file has read permission only.
Refresh the inetd service
refresh -s inetd
After refreshing the inetd service we should be able to login to telnet. If still unable to login the as root user type "smit user" then select "Change / Show Characteristics of a User" type the username that we need to enable the remote access and "User can LOGIN REMOTELY(rsh,tn,rlogin)?" Press Tab key and then set it to true.
Disable Telnet
Login as root user and edit the file vi /etc/inetd.conf and then add a comment # at start of the telnet line
telnet stream tcp6 nowait root /usr/sbin/telnetd telnetd -a
Refresh the inetd service
refresh -s inetd
After refreshing the inetd service we should not be able to login via telnet.
Disable Telnet on user basis.
To disable the remote access to user we should change the settings in the AIX user database. Type "smit user" then select "Change / Show Characteristics of a User" type the username that we need to disable the remote access and "User can LOGIN REMOTELY(rsh,tn,rlogin)?" Press Tab key and then set it to false. This will disable the remote access to the user.
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