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Full Discussion: Reporting SU and Failedlogins
Top Forums Shell Programming and Scripting Reporting SU and Failedlogins Post 100161 by DogDay on Friday 24th of February 2006 08:51:08 AM
Old 02-24-2006
There are a couple of ways to address this.

One is by truncating the wtmp/failedlogin files with fwtmp.

From the fwtmp man page:
Code:
 1. To convert a binary record in wtmp format to an ASCII record called
     dummy.file, enter:

     /usr/sbin/acct/fwtmp < /var/adm/wtmp > dummy.file

     The content of a binary wtmp file is redirected to a dummy ASCII file.
  2. To convert an ASCII dummy.file to a binary file in wtmp format called
     /var/adm/wtmp, enter the fwtmp command with the -ic switch:

     /usr/sbin/acct/fwtmp -ic < dummy.file > /var/adm/wtmp

     The dummy ASCII file is redirected to a binary wtmp file.

After step 1. you could remove X number of lines or manually edit it etc...

Or the easier way:

Code:
who failedlogin|grep $(date +"%b")

Which returns the current months records. Its not the proper way to get that information as the string for February may be found in the username or hostname etc... The proper way would be to use awk and compare $(date +"%b") with $3.

Or you could simply truncate the file on the first of every month with:

Code:
> /var/adm/wtmp
> /etc/security/failedlogin


Good luck.
 

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LEARN ABOUT DEBIAN

aulast

AULAST:(8)						  System Administration Utilities						AULAST:(8)

NAME

       aulast - a program similar to last

SYNOPSIS

       aulast [ options ] [ user ] [ tty ]

DESCRIPTION

       aulast  is  a  program  that prints out a listing of the last logged in users similarly to the program last and lastb. Aulast searches back
       through the audit logs or the given audit log file and displays a list of all users logged in (and out) based on the range of time  in  the
       audit  logs. Names of users and tty's can be given, in which case aulast will show only those entries matching the arguments. Names of ttys
       can be abbreviated, thus aulast 0 is the same as last tty0.

       The pseudo user reboot logs in each time the system is rebooted. Thus last reboot will show a log of all reboots since  the  log  file  was
       created.

       The  main  difference  that  a user will notice is that aulast print events from oldest to newest, while last prints records from newest to
       oldest. Also, the audit system is not notified each time a tty or pty is allocated, so you may not see quite  as  many  records	indicating
       users and their tty's.

OPTIONS

       --bad  Report on the bad logins.

       --extract
	      Write raw audit records used to create the displayed report into a file aulast.log in the current working directory.

       -ffile Use the file instead of the audit logs for input.

       --proof
	      Print  out the audit event serial numbers used to determine the preceding line of the report. A Serial number of 0 is a place holder
	      and not an actual event serial number. The serial numbers can be used to examine the actual audit records in more  detail.  Also	an
	      ausearch query is printed that will let you find the audit records associated with that session.

       --stdin
	      Take audit records from stdin.

EXAMPLES

       To see this month's logins
       ausearch --start this-month --raw | aulast --stdin

SEE ALSO

       last(1), lastb(1), ausearch(8), aureport(8).

AUTHOR

       Steve Grubb

Red Hat 							     Nov 2008								AULAST:(8)
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