Re: login attempts

[Jeff Largent <jlargent@imagelinks.com>]

Just a thought but how about a perl script that tails /var/log/secure
looking for failed login and then emails that to the SysAdmin.

#!/usr/bin/perl -w

use strict;
my $email = "sysadmin@work.bites"
my $logfile = "/var/log/secure";

open(LOG, $logfile);
for(;;) {
    while (<LOG>) {
       if( m/Failed/ ) {
          system("mailto $email -S \"Failed Login\" $_ ~.";
       }
    }
    sleep 15;
    seek(LOG, 0, 1);
}

Probley won't run but you get the idea.  You could replace
the system call with something else from a perl module.

Jeff

Scott Taylor wrote:
> Hello all,
> 
> I know I can find login attempts in the /var/log files.   Does anyone 
> know of  a way to tell ssh2d to send an email to the SysAdmin on failed 
> login attempts?
> 
> I tried with a script /bin/warn:
> #!/bin/bash
> mail -s "$LOGNAME" root <<EOF
> User $LOGNAME attempted to log in at:
> `date`
> From: $SSH_CLIENT
> EOF
> exit 0
> 
> which works fine from the command line, but not always (most of the 
> time) from a login attempt when the users shell is /bin/warn.
> 
> Output, when it works, looks like this:
> 
> Subject: scott
> 
> User scott attempted to log in at:
> Thu Apr 10 07:25:06 PDT 2003
> From: 192.168.99.65 3421 22
> 
> Cheers
> 
> Scott.
> 
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-- 
Jeff Largent                   ImageLinks, Inc.
Sr System Admin                Melbourne, Fl 32935
(321) 253-0011                 fax: (321) 253-5559