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#!/usr/bin/perl -w
##########################################################################
# $Id: portsentry,v 1.5 2003/12/15 18:09:23 kirk Exp $
##########################################################################
########################################################
# This was written and is maintained by:
# Osma Ahvenlampi <oa@iki.fi>
########################################################
use Logwatch ':ip';
$Detail = $ENV{'LOGWATCH_DETAIL_LEVEL'} || 0;
while (defined($ThisLine = <STDIN>)) {
chomp($ThisLine);
next if ($ThisLine eq "");
if ( ( $ThisLine =~ /Starting portsentry/ ) or
( $ThisLine =~ /PortSentry is now active/ ) or
( $ThisLine =~ /Psionic PortSentry .* (starting|shutting)/ ) or
( $ThisLine =~ /portsentry shutdown/ ) ) {
# don't care
} elsif( ($scan,$host,$proto,$port) = ( $ThisLine =~ m|attackalert: (.+) scan from host: [^/]+/(\S+) to (\w+) port: (\d+)| ) ){
$host = LookupIP($host);
$Scans{$scan}{$host}{$port}++;
} elsif ( ($host) = ( $ThisLine =~ /Host (\S+) has been blocked/ ) ){
$host = LookupIP($host);
$Blocked{$host}++;
} elsif( ($host) = ( $ThisLine =~ /Host: (\S+) is already blocked/ ) ){
# ignore
} elsif( ($mode,$proto,$port) = ( $ThisLine =~ /: (.+) scan detection mode activated. Ignored (\w+) port: (\d+)/ ) ){
$Ignored{$mode}{$proto}{$port}++;
} elsif( ($mode,$port) = ( $ThisLine =~ /: (.+) mode will manually exclude port: (\d+)/ ) ){
$Exclude{$mode}{$port}++;
} else{
$Unknown{$ThisLine}++;
}
}
if (keys %Scans) {
print "\nWarning: Portscans detected";
foreach $mode (sort {$a cmp $b} keys %Scans) {
print "\n " . $mode . " from:";
foreach $host (sort {$a cmp $b} keys %{$Scans{$mode}}) {
print "\n " . $host . ": ports:";
$ports = $prev = $list = undef;
foreach $port (sort {$a <=> $b} keys %{$Scans{$mode}{$host}}) {
if ($prev && ($port-1) == $prev) {
$ports .= "-" if (!$list);
$list = 1;
} elsif ($list) {
$ports .= "$prev $port";
$list = undef;
} else {
$ports .= " $port";
}
$prev = $port;
}
$ports .= $prev if ($list);
# don't display the port list if it doesn't fit on one line
if (length($ports) > 55 && $Detail < 10) {
print " (too many, set Detail to High for complete list)";
} else {
print $ports;
}
}
}
print "\n";
}
if (keys %Blocked) {
print "\n";
foreach $host (keys %Blocked) {
print "Warning: Blocked route from/to $host $Blocked{$host} times(s).\n";
}
}
if ( ($Detail >= 10) and (keys %Ignored) ) {
print "\nIgnored following ports";
foreach $mode (sort {$a cmp $b} keys %Ignored) {
print "\n " . $mode . ":";
foreach $proto (sort {$a cmp $b} keys %{$Ignored{$mode}}) {
print "\n " . $proto . ": ports:";
$prev = $list = undef;
foreach $port (sort {$a <=> $b} keys %{$Ignored{$mode}{$proto}}) {
if ($prev && ($port-1) == $prev) {
print "-" if (!$list);
$list = 1;
} elsif ($list) {
print "$prev $port";
$list = undef;
} else {
print " $port";
}
$prev = $port;
}
print $prev if ($list);
}
}
print "\n";
}
if ( ($Detail >= 10) and (keys %Exclude) ) {
print "\nExcluded following ports";
foreach $mode (sort {$a cmp $b} keys %Exclude) {
print "\n " . $mode . ": ports:";
$prev = $list = undef;
foreach $port (sort {$a <=> $b} keys %{$Exclude{$mode}}) {
if ($prev && ($port-1) == $prev) {
print "-" if (!$list);
$list = 1;
} elsif ($list) {
print "$prev $port";
$list = undef;
} else {
print " $port";
}
$prev = $port;
}
print $prev if ($list);
}
print "\n";
}
if ( ($Detail >= 5) and (keys %Unknown) ) {
print "\n**Unmached entries**\n";
foreach $ThisOne (sort {$a cmp $b} keys %Unknown) {
print $Unknown{$ThisOne} . " Time(s): " . $ThisOne . "\n";
}
}
exit(0);
# vi: shiftwidth=3 tabstop=3 et
|
