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Operating Systems AIX disabling telnet login for root only Post 302227018 by otheus on Wednesday 20th of August 2008 11:34:11 AM
Old 08-20-2008
The easiest, portable way is to use the tcpd/tcp_wrappers library by Wietse Venema. With this, /etc/services does not contain the telnetd program directly, but a line that invokes the program "tcpd" which in turn checks the files /etc/hosts.allow and /etc/hosts.deny. In these files, you can set policies however you desire (per process, per user, per source host).

Do a man on hosts_access (5).
 

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fence_rsb(8)						      System Manager's Manual						      fence_rsb(8)

NAME
fence_rsb - I/O Fencing agent for Fujitsu-Siemens RSB SYNOPSIS
fence_rsb [OPTION]... DESCRIPTION
fence_rsb is an I/O Fencing agent which can be used with the Fujitsu-Siemens RSB management interface. It logs into an RSB device via tel- net and reboots the associated machine. Lengthy telnet connections to the RSB device should be avoided while a GFS cluster is running because the connection will block any necessary fencing actions. fence_rsb accepts options on the command line as well as from stdin. Fenced sends parameters through stdin when it execs the agent. fence_rsb can be run by itself with command line options. This is useful for testing. Vendor URL: http://www.fujitsu.com OPTIONS
-a IPaddress IP address or hostname of the RSB device. -h Print out a help message describing available options, then exit. -l login Login name. -n telnet_port The port number on which the telnet service listens. -o action The action required. This can be reboot (default), off, on, or status. -p password Password for login. -S path Full path to an executable to generate the password for login. -v Verbose. Print informational messages to standard out. -V Print out a version message, then exit. STDIN PARAMETERS
agent = < param > This option is used by fence_node(8) and is ignored by fence_rsb. ipaddr = < hostname | ip > IP address or hostname of the device. telnet_port = < port number > The port number on which the telnet service listens. login = < param > Login name. option = < param > The action required. This can be reboot (default), off, on, or status. passwd = < param > Password for login. passwd_script = < param > Full path to an executable to generate the password for login. SEE ALSO
fence(8), fence_node(8) fence_rsb(8)
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