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annotate mod_firewall/scripts/spam-blocking.pfw @ 4047:36b6e3e3f9e2

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mod_conversejs: Disable automatic BOSH/WS endpoint discovery Converse.js 7.0 will enable this by default, but when using this module the BOSH and WebSocket endpoints are provided in the generated HTML, so automatic discovery is not needed and unlikely to work without an additional module.
author Kim Alvefur <zash@zash.se>
date Thu, 18 Jun 2020 15:24:34 +0200
parents 8908d001faf3
children 879955a32a37
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1 #### Anti-spam ruleset ###########################################
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2 #
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3 # This script provides some foundational anti-spam rules. It aims
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4 # to PASS stanzas that are definitely not spam, and DROP stanzas
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5 # that are very likely spam.
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6 #
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7 # It does not do any form of content filtering,
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8 # but this can be implemented by other scripts and
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9 # modules as desired using the chains documented below.
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10 #
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11 #
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12 # The following chains are available as extension
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13 # points:
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14 #
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15 # ::user/spam_check_custom
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16 # Apply additional rules to all stanzas before they are checked.
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17 # Mainly useful to PASS stanzas that you do not want to be
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18 # filtered.
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19 #
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20 # ::user/spam_check_message_custom
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21 # Apply additional rules to messages from strangers, aiming to
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22 # PASS stanzas that are not spam and jump to ::user/spam_reject
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23 # for stanzas that are considered spam.
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24 #
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25 # ::user/spam_check_message_content
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26 # Apply additional rules to messages that may be spam, based on
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27 # message content rules. These may contain more intensive rules,
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28 # so are executed after all other checks. Rules should jump to
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29 # ::user/spam_reject if a message is considered spam.
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30 #
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31 # ::user/spam_check_presence_custom
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32 # Apply additional rules to presence that may be spam.
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33 #
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34 # ::user/spam_check_subscription_request
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35 # Apply additional rules to subscription requests.
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36 #
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37 # ::user/spam_handle_unknown_custom
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38 # Override default handling of stanzas that weren't explicitly
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39 # passed or rejected by the anti-spam checks.
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40 #
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41 # ::user/spam_reject_custom
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42 # Override default handling of stanzas that have
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43 # been recognised as spam (default is to bounce
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44 # a policy-violation error).
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45 #
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46 ##################################################################
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47
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48 #### Entry point for all incoming stanzas ########################
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49 ::deliver
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50
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51 # Override this if you want to prevent certain stanzas going through
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52 # the normal spam_check chain
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53 JUMP_CHAIN=user/spam_check_custom
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54
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55 # Run the default spam_check chain
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56 JUMP_CHAIN=user/spam_check
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57
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58 ##################################################################
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59
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60 #### General spam-checking rules (all stanzas) ###################
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61 ::user/spam_check
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62
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63 # Pass stanzas that a user sends to their own account
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64 TO SELF?
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65 PASS.
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66
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67 # Pass stanzas that are addressed to a valid full JID
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68 TO FULL JID?
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69 PASS.
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70
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71 # Pass stanzas from contacts
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72 SUBSCRIBED?
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73 PASS.
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74
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75 # Run extra rules that apply to messages only
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76 KIND: message
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77 JUMP CHAIN=user/spam_check_message
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78
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79 # Run extra rules that apply to presence stanzas only
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80 KIND: presence
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81 JUMP CHAIN=user/spam_check_presence
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82
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83 JUMP CHAIN=user/spam_handle_unknown
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84
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85 # Default is to allow, override this with
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86 # the 'user/spam_handle_unknown' chain
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87 PASS.
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88
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89 #### Rules for messages ##########################################
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90 ::user/spam_check_message
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92 JUMP CHAIN=user/spam_check_message_custom
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94 # Type 'groupchat' messages addressed to an offline full JID are harmless,
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95 # and should be routed normally to handle MUC 'ghosts' correctly
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96 TO: <*>@<*>/<*>
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97 TYPE: groupchat
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98 PASS.
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99
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100 # Non-chat message types often generate pop-ups in clients,
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101 # so we won't accept them from strangers
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102 NOT TYPE: chat
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103 JUMP CHAIN=user/spam_reject
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104
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105 # This chain can be used by other scripts
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106 # and modules that analyze message content
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107 JUMP CHAIN=user/spam_check_message_content
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108
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109 ##################################################################
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110
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111 #### Rules for presence stanzas ##################################
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112 ::user/spam_check_presence
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114 JUMP CHAIN=user/spam_check_presence_custom
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115
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116 # Presence to offline full JIDs is harmless, and should be routed
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117 # normally to handle MUC 'ghosts' correctly
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118 TO: <*>@<*>/<*>
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119 PASS.
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120
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121 # These may be received if rosters get out of sync and are harmless
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122 # because they will not be routed to the client unless necessary
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123 TYPE: unsubscribe|unsubscribed
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124 PASS.
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125
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126 # We don't want to receive presence from random strangers,
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127 # but still allow subscription requests
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128 NOT TYPE: subscribe
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129 DROP.
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130
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131 # This chain can be used by other scripts
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132 # and modules to filter subscription requests
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133 JUMP CHAIN=user/spam_check_subscription_request
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134
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135 ##################################################################
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136
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137 #### Stanzas reaching this chain will be rejected ################
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138 ::user/spam_reject
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139
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140 # This chain can be used by other scripts
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141 # and modules to override the default behaviour
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142 # when rejecting spam stanzas
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143 JUMP CHAIN=user/spam_reject_custom
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144
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145 LOG=Rejecting suspected spam: $(stanza:top_tag())
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146 BOUNCE=policy-violation
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147
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148 ##################################################################
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149
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150 #### Stanzas that may be spam, but we're not sure either way######
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151 ::user/spam_handle_unknown
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152
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153 # This chain can be used by other scripts
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154 # and modules to apply additional checks, or to
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155 # override the default behaviour
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156 JUMP CHAIN=user/spam_handle_unknown_custom
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157
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158 #LOG=[debug] Spam check allowing: $(stanza:top_tag())
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159
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160 ##################################################################