shadow/man/faillog.8

.\"$Id: faillog.8,v 1.13 2003/05/06 23:06:35 kloczek Exp $
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.TH FAILLOG 8
.SH NAME
faillog \- examine faillog and set login failure limits
.SH SYNOPSIS
.TP 6
\fBfaillog\fR [\fB-u\fR \fIlogin-name\fR] [\fB-a\fR] [\fB-t\fR \fIdays\fR]
[\fB-m\fR \fImax\fR] [\fB-pr\fR] 
.SH DESCRIPTION
\fBfaillog\fR formats the contents of the failure log,
\fI/var/log/faillog\fR, and maintains failure counts and
limits. The order of the arguments to \fBfaillog\fR is significant. Each
argument is processed immediately in the order given.
.PP
The \fB-p\fR flag causes failure entries to be printed in UID order.
Entering \fB-u \fIlogin-name\fR flag will cause the failure record for
\fIlogin-name\fR only to be printed. Entering \fB-t \fIdays\fR will cause
only the failures more recent than \fIdays\fR to be printed. The \fB-t\fR
flag overrides the use of \fB-u\fR. The \fB-a\fR flag causes all users to be
selected. When used with the \fB-p\fR flag, this option selects all users
who have ever had a login failure. It is meaningless with the \fB-r\fR flag.
.PP
The \fB-r\fR flag is used to reset the count of login failures. Write access
to \fI/var/log/faillog\fR is required for this option. Entering \fB-u
\fIlogin-name\fR will cause only the failure count for \fIlogin-name\fR to
be reset.
.PP
The \fB-m\fR flag is used to set the maximum number of login failures before
the account is disabled. Write access to \fI/var/log/faillog\fR is required
for this option. Entering \fB-m \fImax\fR will cause all accounts to be
disabled after \fImax\fR failed logins occur. This may be modified with
\fB-u \fIlogin-name\fR to limit this function to \fIlogin-name\fR only.
Selecting a \fImax\fR value of 0 has the effect of not placing a limit on
the number of failed logins. The maximum failure count should always be 0
for \fBroot\fR to prevent a denial of services attack against the system.
.PP
Options may be combined in virtually any fashion. Each \fB-p\fR, \fB-r\fR,
and \fB-m\fR option will cause immediate execution using any \fB-u\fR or
\fB-t\fR modifier.
.SH CAVEATS
\fBfaillog\fR only prints out users with no successful login since the last
failure. To print out a user who has had a successful login since their last
failure, you must explicitly request the user with the \fB-u\fR flag, or
print out all users with the \fB-a\fR flag.
.PP
Some systems may replace /var/log with /var/adm or /usr/adm.
.SH FILES
\fI/var/log/faillog\fR \	- failure logging file
.SH SEE ALSO
.BR login (1),
.BR faillog (5)
.SH AUTHOR
Julianne Frances Haugh (jockgrrl@ix.netcom.com)