04-03-2006
Denying IPaddress for Multiple Failed Login Attempts
Hi. I would like to be able to deny IP address for too many failed login attemps (either from ssh, sftp, ftp, etc). The system I wish this to work on is an AIX 5.1 system. I'm new to AIX but I'm a linux user. There is a program for linux called fail2ban which reads from the log files and see if there are failed login attemps, and if there are enough (or it meets the conditions you specify) than it will do an action, such as denying all traffic from that IP. In linux this is done by adding the entry to the iptables, but I typed iptables in AIX and It (at least on the server we use) said it did not have such a command. So, does anyone know any program on AIX in which we can see where remote login attempts come from and if they fail many times in a short peorid of time we can ban that IP and drop an email to the sys admin telling them that someone was banned?
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LSLOGINS(1) User Commands LSLOGINS(1)
NAME
lslogins - display information about known users in the system
SYNOPSIS
lslogins [options] [-s|-u[=UID]] [-g groups] [-l logins]
DESCRIPTION
Examine the wtmp and btmp logs, /etc/shadow (if necessary) and /etc/passwd and output the desired data.
The default action is to list info about all the users in the system.
OPTIONS
Mandatory arguments to long options are mandatory for short options too.
-a, --acc-expiration
Display data about the date of last password change and the account expiration date (see shadow(5) for more info). (Requires root
privileges.)
--btmp-file path
Alternate path for btmp.
-c, --colon-separate
Separate info about each user with a colon instead of a newline.
-e, --export
Output data in the format of NAME=VALUE.
-f, --failed
Display data about the users' last failed login attempts.
-G, --supp-groups
Show information about supplementary groups.
-g, --groups=groups
Only show data of users belonging to groups. More than one group may be specified; the list has to be comma-separated.
Note that relation between user and group may be invisible for primary group if the user is not explicitly specify as group member
(e.g. in /etc/group). If the command lslogins scans for groups than it uses groups database only, and user database with primary GID
is not used at all.
-h, --help
Display help information and exit.
-L, --last
Display data containing information about the users' last login sessions.
-l, --logins=logins
Only show data of users with a login specified in logins (user names or user IDS). More than one login may be specified; the list
has to be comma-separated.
-n, --newline
Display each piece of information on a separate line.
--noheadings
Do not print a header line.
--notruncate
Don't truncate output.
-o, --output list
Specify which output columns to print. Use --help to get a list of all supported columns.
-p, --pwd
Display information related to login by password (see also -afL).
-r, --raw
Raw output (no columnation).
-s, --system-accs
Show system accounts. These are by default all accounts with a UID below 1000 (non-inclusive), with the exception of either nobody
or nfsnobody (UID 65534). This hardcoded default maybe overwritten by parameters SYS_UID_MIN and SYS_UID_MAX in the file
/etc/login.defs.
--time-format type
Display dates in short, full or iso format. The default is short, this time format is designed to be space efficient and human
readable.
-u, --user-accs
Show user accounts. These are by default all accounts with UID above 1000 (inclusive), with the exception of either nobody or nfs-
nobody (UID 65534). This hardcoded default maybe overwritten by parameters UID_MIN and UID_MAX in the file /etc/login.defs.
-V, --version
Display version information and exit.
--wtmp-file path
Alternate path for wtmp.
-Z, --context
Display the users' security context.
-z, --print0
Delimit user entries with a nul character, instead of a newline.
NOTES
The default UID thresholds are read from /etc/login.defs.
EXIT STATUS
0 if OK,
1 if incorrect arguments specified,
2 if a serious error occurs (e.g. a corrupt log).
SEE ALSO
group(5), passwd(5), shadow(5), utmp(5)
HISTORY
The lslogins utility is inspired by the logins utility, which first appeared in FreeBSD 4.10.
AUTHORS
Ondrej Oprala <ooprala@redhat.com>
Karel Zak <kzak@redhat.com>
AVAILABILITY
The lslogins command is part of the util-linux package and is available from Linux Kernel Archive <https://www.kernel.org/pub/linux/utils
/util-linux/>.
util-linux April 2014 LSLOGINS(1)