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########################################################
# Please file all bug reports, patches, and feature
# requests under:
# https://sourceforge.net/p/logwatch/_list/tickets
# Help requests and discusion can be filed under:
# https://sourceforge.net/p/logwatch/discussion/
########################################################
#######################################################
## Copyright (c) 2021-2022 Orion Poplawski
## Covered under the included MIT/X-Consortium License:
## http://www.opensource.org/licenses/mit-license.php
## All modifications and contributions by other persons to
## this script are assumed to have been donated to the
## Logwatch project and thus assume the above copyright
## and licensing terms. If you want to make contributions
## under your own copyright or a different license this
## must be explicitly stated in the contribution an the
## Logwatch project reserves the right to not accept such
## contributions. If you have made significant
## contributions to this script and want to claim
## copyright please contact logwatch-devel@lists.sourceforge.net.
#########################################################
use warnings;
use strict;
use Logwatch ':all';
my $Debug = $ENV{'LOGWATCH_DEBUG'} || 0;
my $Detail = $ENV{'LOGWATCH_DETAIL_LEVEL'} || 0;
my $IgnoreHost = $ENV{'ignore_host'} || "";
my $IllegalUsersThreshold = $ENV{'illegal_users_threshold'} || 0;
$main::DoLookup = $ENV{'sshd_ip_lookup'};
my $DebugCounter = 0;
#Init String Containers
my (
$Host, $Key, $Method,
$Port, $User, $user,
);
my %Users = ();
my %NonexistentUsers = ();
my %BadPassword = ();
my %OtherList = ();
my $NetworkErrors = 0;
my $Kills = 0;
while (defined(my $ThisLine = <STDIN>)) {
chomp($ThisLine);
if (
($ThisLine =~ /Connection reset by peer/) or
($ThisLine =~ /^Child connection from/) or
($ThisLine =~ /Disconnect received/) or
($ThisLine =~ /Exited normally/) or
($ThisLine =~ /Not backgrounding/) or
0 # This line prevents blame shifting as lines are added above
) {
# Ignore these
} elsif ( ($Method,$User,$Host,$Port) = ($ThisLine =~ /^(\S+) auth succeeded for '(.*)' from ([\d\.:a-f]+)(?:%\w+)?:(\d+)/) ) {
if ($Detail >= 20) {
$Users{$User}{$Host}{$Method}++;
} else {
if ( $Host !~ /$IgnoreHost/ ) {
$Users{$User}{$Host}{"(all)"}++;
}
}
} elsif ( ($Method,$User,$Key,$Host,$Port) = ($ThisLine =~ /^(\S+) auth succeeded for '(.*)' with.* key (.*) from ([\d\.:a-f]+)(?:%\w+)?:(\d+)/) ) {
if ($Detail >= 20) {
$Users{$User}{$Host}{$Method . " ($Key)"}++;
} else {
if ( $Host !~ /$IgnoreHost/ ) {
$Users{$User}{$Host}{"(all)"}++;
}
}
} elsif (
($ThisLine =~ m/^Error reading/ ) or
0
) {
$NetworkErrors++;
} elsif ( ($User,$Host) = ($ThisLine =~ /^Bad password attempt for '(.*)' from ([^ ]*):/)) {
$BadPassword{$Host}{$User}++;
} elsif ( ($Host) = ($ThisLine =~ /^Login attempt for nonexistent user from ([^ ]*):/)) {
$NonexistentUsers{$Host}++;
} elsif ( $ThisLine =~ /^Login attempt for nonexistent user/) {
$NonexistentUsers{"unknown"}++;
} elsif ( $ThisLine =~ m/Terminated by signal/) {
$Kills++;
} else {
$OtherList{$ThisLine} += 1;
}
}
###########################################################
sub timesplural {
my ($count) = @_;
my $plural = ($count > 1) ? "s" : "";
return "$count Time$plural\n";
}
if ($NetworkErrors) {
print "\nNetwork Read Write Errors: " . $NetworkErrors . "\n";
}
if ($Kills) {
print "\nKilled: " . timesplural($Kills);
}
if (keys %BadPassword) {
print "\nBad password attempts:\n";
foreach my $ip (sort SortIP keys %BadPassword) {
my $name = LookupIP($ip);
my $totcount = 0;
foreach my $user (keys %{$BadPassword{$ip}}) {
$totcount += $BadPassword{$ip}{$user};
}
print " $name: ". timesplural($totcount);
if ($Detail >= 5) {
my $sort = CountOrder(%{$BadPassword{$ip}});
foreach my $user (sort $sort keys %{$BadPassword{$ip}}) {
my $val = $BadPassword{$ip}{$user};
print " $user: " . timesplural($val);
}
}
}
}
if (keys %NonexistentUsers) {
print "\nNon-existent users from";
if ($IllegalUsersThreshold) {
print " (with threshold >= $IllegalUsersThreshold)";
}
print ":\n";
foreach my $ip (sort SortIP keys %NonexistentUsers) {
my $name = LookupIP($ip);
print " $name: " . timesplural($NonexistentUsers{$ip});
}
}
if (keys %Users) {
print "\nUsers logging in through sshd:\n";
foreach my $user (sort {$a cmp $b} keys %Users) {
print " $user:\n";
if ($Detail < 20) {
my $totalSort = TotalCountOrder(%{$Users{$user}}, \&SortIP);
foreach my $ip (sort $totalSort keys %{$Users{$user}}) {
my $name = LookupIP($ip);
my $val = (values %{$Users{$user}{$ip}})[0];
print " $name: " . timesplural($val);
}
} else {
my %Methods = ();
foreach my $ip (keys %{$Users{$user}}) {
foreach my $method (keys %{$Users{$user}{$ip}}) {
$Methods{$method}{$ip} = $Users{$user}{$ip}{$method};
}
}
if (scalar keys %{$Users{$user}} < scalar %Methods) {
my $totalSort = TotalCountOrder(%{$Users{$user}}, \&SortIP);
foreach my $ip (sort $totalSort keys %{$Users{$user}}) {
my $name = LookupIP($ip);
print " $name:\n";
my $sort = CountOrder(%{$Users{$user}{$ip}});
foreach my $method (sort $sort keys %{$Users{$user}{$ip}}) {
my $val = $Users{$user}{$ip}{$method};
print " $method: " . timesplural($val);
}
}
} else {
my $totalSort = TotalCountOrder(%Methods);
foreach my $method (sort $totalSort keys %Methods) {
print " $method:\n";
my $sort = CountOrder(%{$Methods{$method}});
foreach my $ip (sort $sort keys %{$Methods{$method}}) {
my $name = LookupIP($ip);
my $val = (values %{$Users{$user}{$ip}})[0];
print " $name: " . timesplural($val);
}
}
}
}
}
}
if (keys %OtherList) {
print "\n**Unmatched Entries**\n";
print "$_ : " . timesplural($OtherList{$_}) foreach sort keys %OtherList;
}
exit(0);
# vi: shiftwidth=3 tabstop=3 syntax=perl et
# Local Variables:
# mode: perl
# perl-indent-level: 3
# indent-tabs-mode: nil
# End:
|
