Bash auto lock?

[Amos Shapira]

Hello,

As part of PCI DSS compliance process
(http://en.wikipedia.org/wiki/PCI_DSS) one of the questions there is
about forcing auto-lock of shell sessions upon inactivity.

I know about autologout in sshd, which I personally disable (but maybe
now will have to enable for PCI compliance).

But if auto-lock is acceptable then it looks more appealing to me
since it would mean that I won't lose remote sessions while going out
to lunch.

Back in BSD 4 there used to be a utility to lock the screen called
"lock". I don't see it any more. The closest I found is "vlock" which
at first I though is meant to be used only on virtual consoles but
apparently it can be used for ssh session as well.

Here is a link on how to set this up with zsh, and why it won't work
for bash: http://www.howtointernets.com/wiki/index.php/Set_up_Inactive_Shell_Timeout_/_Lock_on_CentOS_5

Does anyone know how to achieve what I'm looking for?

Thanks,

--Amos