annotate common/logwatch/services-fail2ban @ 192:893391e42d94 puppet-3.6

Update logwatch fail2ban handling for v0.10 log changes * Ignore "Flush tickets" * Tighten regex so "[rule] Restore Ban" doesn't become separate "rule] Restore"
author IBBoard <dev@ibboard.co.uk>
date Tue, 12 Feb 2019 21:04:51 +0000
parents 4be7f49debc2
children
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1 ##########################################################################
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2 # $Id: fail2ban 226 2014-09-09 11:07:27Z stefjakobs $
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3 ##########################################################################
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4 # $Log: fail2ban,v $
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5 # Revision 1.5b - IBBoard
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6 # Patched up to cover fail2ban 0.10
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7 #
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8 # Revision 1.5a - IBBoard
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9 # Patched up to what we see on CentOS 6 w/fail2ban-0.9.2
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10 #
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11 # Revision 1.5 2008/08/18 16:07:46 mike
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12 # Patches from Paul Gear <paul at libertysys.com> -mgt
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13 #
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14 # Revision 1.4 2008/06/30 23:07:51 kirk
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15 # fixed copyright holders for files where I know who they should be
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16 #
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17 # Revision 1.3 2008/03/24 23:31:26 kirk
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18 # added copyright/license notice to each script
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19 #
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20 # Revision 1.2 2006/12/15 04:53:59 bjorn
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21 # Additional filtering, by Willi Mann.
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22 #
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23 # Revision 1.1 2006/05/30 19:04:26 bjorn
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24 # Added fail2ban service, written by Yaroslav Halchenko.
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25 #
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26 # Written by Yaroslav Halchenko <debian@onerussian.com> for fail2ban
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27 #
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28 ##########################################################################
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29
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30 ########################################################
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31 ## Copyright (c) 2008 Yaroslav Halchenko
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32 ## Covered under the included MIT/X-Consortium License:
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33 ## http://www.opensource.org/licenses/mit-license.php
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34 ## All modifications and contributions by other persons to
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35 ## this script are assumed to have been donated to the
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36 ## Logwatch project and thus assume the above copyright
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37 ## and licensing terms. If you want to make contributions
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38 ## under your own copyright or a different license this
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39 ## must be explicitly stated in the contribution an the
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40 ## Logwatch project reserves the right to not accept such
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41 ## contributions. If you have made significant
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42 ## contributions to this script and want to claim
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43 ## copyright please contact logwatch-devel@lists.sourceforge.net.
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44 #########################################################
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45
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46 use strict;
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47 use Logwatch ':all';
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48
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49 my $Debug = $ENV{'LOGWATCH_DEBUG'} || 0;
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50 my $Detail = $ENV{'LOGWATCH_DETAIL_LEVEL'} || 0;
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51 my $IgnoreHost = $ENV{'sshd_ignore_host'} || "";
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52 my $DebugCounter = 0;
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53 my $ReInitializations = 0;
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54 my @IptablesErrors = ();
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55 my @ActionErrors = ();
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56 my $NotValidIP = 0; # reported invalid IPs number
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57 my @OtherList = ();
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58
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59 my %ServicesBans = ();
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60
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61 if ( $Debug >= 5 ) {
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62 print STDERR "\n\nDEBUG: Inside Fail2Ban Filter \n\n";
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63 $DebugCounter = 1;
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64 }
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65
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66 while (defined(my $ThisLine = <STDIN>)) {
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67 if ( $Debug >= 5 ) {
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68 print STDERR "DEBUG($DebugCounter): $ThisLine";
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69 $DebugCounter++;
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70 }
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71 chomp($ThisLine);
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72 if ( ($ThisLine =~ /..,... DEBUG: /) or
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73 ($ThisLine =~ /..,... \S*\s*: DEBUG /) or # syntax of 0.7.? fail2ban
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74 ($ThisLine =~ /..,... INFO: (Fail2Ban v.* is running|Exiting|Enabled sections:)/) or
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75 ($ThisLine =~ /INFO\s+Log rotation detected for/) or
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76 ($ThisLine =~ /INFO\s+Jail.+(?:stopped|started|uses poller|uses pyinotify)/) or
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77 ($ThisLine =~ /INFO\s+Changed logging target to/) or
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78 ($ThisLine =~ /INFO\s+Creating new jail/) or
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79 ($ThisLine =~ /..,... \S+\s*: INFO\s+(Set |Socket|Exiting|Gamin|Created|Added|Using)/) or # syntax of 0.7.? fail2ban
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80 ($ThisLine =~ /..,... WARNING: Verbose level is /) or
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81 ($ThisLine =~ /..,... WARNING: Restoring firewall rules/) or
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82 ($ThisLine =~ /WARNING Determined IP using DNS Lookup: [^ ]+ = \['[^']+'\]/) or
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83 ($ThisLine =~ /INFO\s+(Stopping all jails|Exiting Fail2ban)/) or
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84 ($ThisLine =~ /INFO\s+Initiated 'pyinotify' backend/) or
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85 ($ThisLine =~ /INFO\s+(Added logfile = .*|Set maxRetry = \d+|Set findtime = \d+|Set banTime = \d+)/)
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86 )
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87 {
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88 if ( $Debug >= 6 ) {
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89 print STDERR "DEBUG($DebugCounter): line ignored\n";
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90 }
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91 } elsif ( ($ThisLine =~ /INFO\s+\[[^\]]+\] Found [0-9\.]+/) ) {
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92 if ( $Debug >= 6 ) {
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93 print STDERR "DEBUG($DebugCounter): line ignored\n";
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94 }
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95 } elsif ( my ($Service,$Action,$Host) = ($ThisLine =~ m/(?:WARNING|NOTICE):?\s+\[?(.*?)[]:]?\s(?:Restore )?(Ban|Unban)[^\.]* (\S+)/)) {
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96 if ( $Debug >= 6 ) {
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97 print STDERR "DEBUG($DebugCounter): Found $Action for $Service from $Host\n";
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98 }
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99 $ServicesBans{$Service}{$Host}{$Action}++;
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100 $ServicesBans{$Service}{"(all)"}{$Action}++;
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101 } elsif ( my ($Service,$Host,$NumFailures) = ($ThisLine =~ m/INFO: (\S+): (.+) has (\d+) login failure\(s\). Banned./)) {
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102 if ($Debug >= 4) {
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103 print STDERR "DEBUG: Found host $Host trying to access $Service - failed $NumFailures times\n";
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104 }
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105 push @{$ServicesBans{$Service}{$Host}{'Failures'}}, $NumFailures;
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106 } elsif ( my ($Service,$Host) = ($ThisLine =~ m/ ERROR:\s(.*):\s(\S+)\salready in ban list/)) {
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107 $ServicesBans{$Service}{$Host}{'AlreadyInTheList'}++;
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108 } elsif ( my ($Service,$Host) = ($ThisLine =~ m/(?:INFO|WARNING|NOTICE)\s*\[(.*)\]\s*(\S+)\s*already banned/)) {
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109 $ServicesBans{$Service}{$Host}{'AlreadyInTheList'}++;
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110 } elsif ( my ($Service,$Host) = ($ThisLine =~ m/ WARNING:\s(.*):\sReBan (\S+)/)) {
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111 $ServicesBans{$Service}{$Host}{'ReBan'}++;
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112 } elsif ($ThisLine =~ / ERROR:?\s*(Execution of command )?\'?iptables/) {
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113 push @IptablesErrors, "$ThisLine\n";
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114 } elsif ($ThisLine =~ /ERROR.*returned \d+$/) {
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115 push @ActionErrors, "$ThisLine\n";
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116 } elsif (($ThisLine =~ /..,... WARNING: \#\S+ reinitialization of firewalls/) or
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117 ($ThisLine =~ / ERROR\s*Invariant check failed. Trying to restore a sane environment/)) {
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118 $ReInitializations++;
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119 } elsif ($ThisLine =~ /..,... WARNING: is not a valid IP address/) {
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120 # just ignore - this will be fixed within fail2ban and is harmless warning
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121 } elsif ($ThisLine =~ /Flush ticket\(s\)/) {
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122 # just ignore - this is fail2ban 0.10 doing a quick shutdown/restart
66
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123 }
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124 else
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125 {
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126 # Report any unmatched entries...
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127 push @OtherList, "$ThisLine\n";
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128 }
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129 }
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130
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131 ###########################################################
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132
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133
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134 if (keys %ServicesBans) {
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135 printf("\nBanned services with Fail2Ban: Bans:Unbans\n");
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136 foreach my $service (sort {$a cmp $b} keys %ServicesBans) {
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137 printf(" %-55s [%3d:%-3d]\n", "$service:",
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138 $ServicesBans{$service}{'(all)'}{'Ban'},
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IBBoard <dev@ibboard.co.uk>
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139 $ServicesBans{$service}{'(all)'}{'Unban'});
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IBBoard <dev@ibboard.co.uk>
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140 delete $ServicesBans{$service}{'(all)'};
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IBBoard <dev@ibboard.co.uk>
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141 my $totalSort = TotalCountOrder(%{$ServicesBans{$service}}, \&SortIP);
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IBBoard <dev@ibboard.co.uk>
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142 if ($Detail >= 5) {
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IBBoard <dev@ibboard.co.uk>
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143 foreach my $ip (sort $totalSort keys %{$ServicesBans{$service}}) {
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IBBoard <dev@ibboard.co.uk>
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144 my $name = LookupIP($ip);
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IBBoard <dev@ibboard.co.uk>
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145 printf(" %-53s %3d:%-3d\n",
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IBBoard <dev@ibboard.co.uk>
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diff changeset
146 $name,
e424cd208b99 Update/fix Fail2Ban parsing in Logwatch
IBBoard <dev@ibboard.co.uk>
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147 $ServicesBans{$service}{$ip}{'Ban'},
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IBBoard <dev@ibboard.co.uk>
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148 $ServicesBans{$service}{$ip}{'Unban'});
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IBBoard <dev@ibboard.co.uk>
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149 if (($Detail >= 10) and ($ServicesBans{$service}{$ip}{'Failures'}>0)) {
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IBBoard <dev@ibboard.co.uk>
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150 print " Failed ";
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IBBoard <dev@ibboard.co.uk>
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151 foreach my $fails (@{$ServicesBans{$service}{$ip}{'Failures'}}) {
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IBBoard <dev@ibboard.co.uk>
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152 print " $fails";
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IBBoard <dev@ibboard.co.uk>
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153 }
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IBBoard <dev@ibboard.co.uk>
parents:
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154 print " times";
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IBBoard <dev@ibboard.co.uk>
parents:
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155 printf("\n %d Duplicate Ban attempts", $ServicesBans{$service}{$ip}{'AlreadyInTheList'}) ;
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IBBoard <dev@ibboard.co.uk>
parents:
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156 printf("\n %d ReBans due to rules reinitilizations", $ServicesBans{$service}{$ip}{'ReBan'}) ;
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IBBoard <dev@ibboard.co.uk>
parents:
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157 print "\n";
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IBBoard <dev@ibboard.co.uk>
parents:
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158 }
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IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
159 }
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IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
160 }
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IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
161 }
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IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
162 }
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IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
163
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IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
164
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IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
165 if ($Detail>0) {
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IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
166 if ($#IptablesErrors > 0) {
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IBBoard <dev@ibboard.co.uk>
parents:
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167 printf("\n%d faulty iptables invocation(s)", $#IptablesErrors);
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IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
168 if ($Detail > 5) {
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IBBoard <dev@ibboard.co.uk>
parents:
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169 print ":\n";
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IBBoard <dev@ibboard.co.uk>
parents:
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170 print @IptablesErrors ;
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IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
171 }
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IBBoard <dev@ibboard.co.uk>
parents:
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172 }
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IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
173 if ($#ActionErrors > 0) {
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IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
174 printf("\n%d error(s) returned from actions", $#ActionErrors);
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IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
175 if ($Detail > 5) {
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IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
176 print ":\n";
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IBBoard <dev@ibboard.co.uk>
parents:
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177 print @ActionErrors ;
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IBBoard <dev@ibboard.co.uk>
parents:
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178 }
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IBBoard <dev@ibboard.co.uk>
parents:
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179 }
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IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
180 if ($ReInitializations > 0) {
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IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
181 printf("\n%d fail2ban rules reinitialization(s)", $ReInitializations);
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IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
182 }
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IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
183 if ($#OtherList >= 0) {
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IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
184 print "\n**Unmatched Entries**\n";
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IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
185 print @OtherList;
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IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
186 }
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IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
187 }
e424cd208b99 Update/fix Fail2Ban parsing in Logwatch
IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
188
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IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
189 exit(0);
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IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
190
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IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
191 # vi: shiftwidth=3 tabstop=3 syntax=perl et
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IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
192 # Local Variables:
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IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
193 # mode: perl
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IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
194 # perl-indent-level: 3
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IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
195 # indent-tabs-mode: nil
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IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
196 # End: