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Network Security Focus-Linux
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Re: Idle session logout

Subject: Re: Idle session logout
Date: Mon, 25 Oct 2004 23:04:47 +0300
Andy Smith wrote:
Sanjeev B.S. wrote:

try to set TMOUT=<seconds> in /etc/profile.



TMOUT works only for bash shell users, isn't it? May be running a simple shell script with kill -9 that checks with 'finger foo', grepping idle time, might be a good idea. First get the pts, say 'pts/2', then check it with ps -ef | grep 'pts/2'. Then decide whether to for logout.



This solution would require the finger deamon to be running which just opens another can of security worms :-)
in linux, finger can be used on a local system without running the daemon
[wolfy@wolfy2 wolfy]$ netstat -atup|grep LISTEN
(Not all processes could be identified, non-owned process info
 will not be shown, you would have to be root to see it all.)
tcp        0      0 *:5800   *:*      LISTEN      1032/kdeinit: kded
tcp        0      0 *:5900   *:*      LISTEN      1032/kdeinit: kded
tcp        0      0 *:x11    *:*      LISTEN      -
tcp        0      0 *:ssh    *:*      LISTEN      -
[wolfy@wolfy2 wolfy]$ finger wolfy
Login: wolfy                            Name: (null)
Directory: /home/wolfy                  Shell: /bin/bash
On since Mon Oct 25 21:50 (EEST) on pts/0   1 hour 12 minutes idle
On since Mon Oct 25 23:00 (EEST) on pts/1   2 minutes 6 seconds idle
     (messages off)
On since Mon Oct 25 23:01 (EEST) on pts/2 (messages off)
No mail.
No Plan.

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