How to install SSH on AIX 6.1 and turn off telnet

One of my biggest gripes about AIX is how security un-conscious it is.  SSH now “comes with” AIX, but it’s on a separate cd.  Anyway, enough griping.  Here are the procedures.

Installing OpenSSH on AIX 6.1

1) Obtain the files. It’s downloadable here: http://sourceforge.net/projects/openssh-aix/.  Or you can find it on the expansion CD.  Or the Linux toolkit for AIX CD.

2)  Install.  If you’re using a CD, follow my directions for installing lsof from here (of course, replace openssh with lsof).  Otherwise, I have some installp examples here.

3) Start your SSH.

AIX61# startsrc -g ssh

4) Edit your /etc/hosts.allow file. Otherwise you’ll see an error that says this:

ssh_exchange_identification: Connection closed by remote host

5) Test it out.

Linux# ssh AIX61

How to Disable Telnet on AIX 6.1

1) Comment out telnet from /etc/inetd.conf.

2) Reload the configuration file

AIX61# refresh -s inetd

3) Test. You should get a nice error message like this:

Linux# telnet AIX6.1
Trying 10.1.1.10…
telnet: connect to address 10.1.1.10: Connection refused
telnet: Unable to connect to remote host: Connection refused

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