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annotate mod_firewall/scripts/spam-blocking.pfw @ 5551:8bfcedd93a72

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mod_rest: List all error conditions in OpenAPI spec These are not handled by datamanager but by util.stanza and util.error, so they are not represented in the JSON schema file.
author Kim Alvefur <zash@zash.se>
date Sat, 17 Jun 2023 16:26:33 +0200
parents 09311a8a3cfa
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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_custom
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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_custom
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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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93
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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 # Mediated MUC invitations are naturally from 'strangers' and have special
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101 # handling. We lean towards accepting them, unless overridden by custom rules.
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102 NOT FROM FULL JID?
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103 INSPECT: {http://jabber.org/protocol/muc#user}x/invite
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104 JUMP CHAIN=user/spam_check_muc_invite
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105
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106 # Non-chat message types often generate pop-ups in clients,
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107 # so we won't accept them from strangers
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108 NOT TYPE: chat
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109 JUMP CHAIN=user/spam_reject
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111 JUMP CHAIN=user/spam_check_message_content
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112
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113 # This chain can be used by other scripts
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114 # and modules that analyze message content
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115 JUMP CHAIN=user/spam_check_message_content_custom
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116
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117 ##################################################################
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118
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119 #### Rules for presence stanzas ##################################
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120 ::user/spam_check_presence
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122 JUMP CHAIN=user/spam_check_presence_custom
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123
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124 # Presence to offline full JIDs is harmless, and should be routed
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125 # normally to handle MUC 'ghosts' correctly
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126 TO: <*>@<*>/<*>
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127 PASS.
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128
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129 # These may be received if rosters get out of sync and are harmless
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130 # because they will not be routed to the client unless necessary
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131 TYPE: unsubscribe|unsubscribed
56db2ab3b853 mod_firewall: spam-blocking.pfw: Allow unsubscribe/unsubscribed presence
Matthew Wild <mwild1@gmail.com>
parents: 2556
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132 PASS.
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133
2556
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134 # We don't want to receive presence from random strangers,
cc01a5bfcf3b mod_firewall: spam-blocking.pfw, initial anti-spam ruleset
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135 # but still allow subscription requests
4128
879955a32a37 mod_firewall: spam-blocking.pfw: allow subscription acks through
Matthew Wild <mwild1@gmail.com>
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136 NOT TYPE: subscribe|subscribed
2556
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137 DROP.
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138
cc01a5bfcf3b mod_firewall: spam-blocking.pfw, initial anti-spam ruleset
Matthew Wild <mwild1@gmail.com>
parents:
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139 # This chain can be used by other scripts
cc01a5bfcf3b mod_firewall: spam-blocking.pfw, initial anti-spam ruleset
Matthew Wild <mwild1@gmail.com>
parents:
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140 # and modules to filter subscription requests
2565
fc53165d8afe spam-blocking.pfw: Much improvement
Matthew Wild <mwild1@gmail.com>
parents: 2557
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141 JUMP CHAIN=user/spam_check_subscription_request
fc53165d8afe spam-blocking.pfw: Much improvement
Matthew Wild <mwild1@gmail.com>
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142
4149
bb60db2b2cd1 mod_firewall: Update another chain name for consistency
Matthew Wild <mwild1@gmail.com>
parents: 4148
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143 JUMP CHAIN=user/spam_check_subscription_request_custom
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144
2565
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parents: 2557
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145 ##################################################################
2556
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parents:
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146
5531
af2778f4ee29 mod_firewall: scripts: spam-blocking.pfw: Add special handling for MUC invites
Matthew Wild <mwild1@gmail.com>
parents: 4149
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147 #### Rules for MUC invitations ###################################
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148
af2778f4ee29 mod_firewall: scripts: spam-blocking.pfw: Add special handling for MUC invites
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parents: 4149
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149 ::user/spam_check_muc_invite
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150
af2778f4ee29 mod_firewall: scripts: spam-blocking.pfw: Add special handling for MUC invites
Matthew Wild <mwild1@gmail.com>
parents: 4149
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151 # This chain can be used to inspect the invitation and determine
af2778f4ee29 mod_firewall: scripts: spam-blocking.pfw: Add special handling for MUC invites
Matthew Wild <mwild1@gmail.com>
parents: 4149
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152 # the appropriate action. Otherwise, we proceed with the default
af2778f4ee29 mod_firewall: scripts: spam-blocking.pfw: Add special handling for MUC invites
Matthew Wild <mwild1@gmail.com>
parents: 4149
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153 # action below.
af2778f4ee29 mod_firewall: scripts: spam-blocking.pfw: Add special handling for MUC invites
Matthew Wild <mwild1@gmail.com>
parents: 4149
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154 JUMP CHAIN=user/spam_check_muc_invite_custom
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Matthew Wild <mwild1@gmail.com>
parents: 4149
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155
af2778f4ee29 mod_firewall: scripts: spam-blocking.pfw: Add special handling for MUC invites
Matthew Wild <mwild1@gmail.com>
parents: 4149
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156 # Allow mediated MUC invitations by default
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Matthew Wild <mwild1@gmail.com>
parents: 4149
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157 PASS.
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Matthew Wild <mwild1@gmail.com>
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158
2565
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159 #### Stanzas reaching this chain will be rejected ################
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Matthew Wild <mwild1@gmail.com>
parents: 2557
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160 ::user/spam_reject
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Matthew Wild <mwild1@gmail.com>
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161
fc53165d8afe spam-blocking.pfw: Much improvement
Matthew Wild <mwild1@gmail.com>
parents: 2557
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162 # This chain can be used by other scripts
fc53165d8afe spam-blocking.pfw: Much improvement
Matthew Wild <mwild1@gmail.com>
parents: 2557
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163 # and modules to override the default behaviour
fc53165d8afe spam-blocking.pfw: Much improvement
Matthew Wild <mwild1@gmail.com>
parents: 2557
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164 # when rejecting spam stanzas
fc53165d8afe spam-blocking.pfw: Much improvement
Matthew Wild <mwild1@gmail.com>
parents: 2557
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165 JUMP CHAIN=user/spam_reject_custom
2556
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Matthew Wild <mwild1@gmail.com>
parents:
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166
cc01a5bfcf3b mod_firewall: spam-blocking.pfw, initial anti-spam ruleset
Matthew Wild <mwild1@gmail.com>
parents:
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167 LOG=Rejecting suspected spam: $(stanza:top_tag())
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parents:
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168 BOUNCE=policy-violation
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169
fc53165d8afe spam-blocking.pfw: Much improvement
Matthew Wild <mwild1@gmail.com>
parents: 2557
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170 ##################################################################
fc53165d8afe spam-blocking.pfw: Much improvement
Matthew Wild <mwild1@gmail.com>
parents: 2557
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171
5531
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Matthew Wild <mwild1@gmail.com>
parents: 4149
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172 #### Stanzas that may be spam, but we're not sure either way #####
2565
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Matthew Wild <mwild1@gmail.com>
parents: 2557
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173 ::user/spam_handle_unknown
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Matthew Wild <mwild1@gmail.com>
parents: 2557
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174
fc53165d8afe spam-blocking.pfw: Much improvement
Matthew Wild <mwild1@gmail.com>
parents: 2557
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175 # This chain can be used by other scripts
fc53165d8afe spam-blocking.pfw: Much improvement
Matthew Wild <mwild1@gmail.com>
parents: 2557
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176 # and modules to apply additional checks, or to
fc53165d8afe spam-blocking.pfw: Much improvement
Matthew Wild <mwild1@gmail.com>
parents: 2557
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177 # override the default behaviour
fc53165d8afe spam-blocking.pfw: Much improvement
Matthew Wild <mwild1@gmail.com>
parents: 2557
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178 JUMP CHAIN=user/spam_handle_unknown_custom
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Matthew Wild <mwild1@gmail.com>
parents: 2557
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179
fc53165d8afe spam-blocking.pfw: Much improvement
Matthew Wild <mwild1@gmail.com>
parents: 2557
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180 #LOG=[debug] Spam check allowing: $(stanza:top_tag())
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Matthew Wild <mwild1@gmail.com>
parents: 2557
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181
fc53165d8afe spam-blocking.pfw: Much improvement
Matthew Wild <mwild1@gmail.com>
parents: 2557
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182 ##################################################################