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mod_firewall: Add support for tracing rule evaluation in real-time
author Matthew Wild <mwild1@gmail.com>
date Mon, 11 May 2026 13:37:19 +0100
parents c819b1b5a775
children
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1 ---
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2 labels:
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3 - Stage-Stable
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4 summary: Redirect long messages to built-in pastebin
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5 ---
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7 # Introduction
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8
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9 Pastebins are used very often in IM, especially in chat rooms. You have
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10 a long log or command output which you need to send to someone over IM,
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11 and don't want to fill their message window with it. Put it on a
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12 pastebin site, and give them the URL instead, simple.
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14 Not for everyone... no matter how hard you try, people will be unaware,
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15 or not care. They may also be too lazy to visit a pastebin. This is
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16 where mod_pastebin comes in!
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18 # Details
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19
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20 When someone posts to a room a "large" (the actual limit is
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21 configurable) message, Prosody will intercept the message and convert it
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22 to a URL pointing to a built-in pastebin server. The URLs are randomly
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23 generated, so they can be considered for most purposes to be private,
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24 and cannot be discovered by people who are not in the room.
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26 **Note:** mod_pastebin cannot read, and therefore does not act on, end-to-end
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27 encrypted messages (e.g. messages using OMEMO).
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28
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29 # Usage
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31 To set up mod_pastebin for MUC rooms it **must** be explicitly loaded,
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32 as in the example below - it won't work when loaded globally, as that
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33 will only load it onto normal virtual hosts.
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35 For example:
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36
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37 Component "conference.example.com" "muc"
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38 modules_enabled = { "pastebin" }
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39
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40 Pastes will be available by default at
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41 `http://<your-prosody>:5280/pastebin/` by default.
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42
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43 Ports and path can be changed with [HTTP
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44 settings](https://prosody.im/doc/http), for example like:
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45
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46 ``` {.lua}
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47 http_paths = {
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48 pastebin = "/$host-paste";
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49 }
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50 ```
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51
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52 # Discovery
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54 The line and character tresholds are advertised in
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55 [service discovery][xep-0030] like this:
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56
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57 ``` {.xml}
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58 <iq id="791d37e8-86d8-45df-adc2-9bcb17c45cb7" type="result" xml:lang="en" from="prosody@conference.prosody.im">
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59 <query xmlns="http://jabber.org/protocol/disco#info">
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60 <identity type="text" name="Prosŏdy IM Chatroom" category="conference"/>
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61 <feature var="http://jabber.org/protocol/muc"/>
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62 <feature var="https://modules.prosody.im/mod_pastebin"/>
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63 <x xmlns="jabber:x:data" type="result">
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64 <field type="hidden" var="FORM_TYPE">
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65 <value>http://jabber.org/protocol/muc#roominfo</value>
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66 </field>
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67 <field label="Title" type="text-single" var="muc#roomconfig_roomname">
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68 <value>Prosŏdy IM Chatroom</value>
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69 </field>
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70 <!-- etc... -->
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71 <field type="text-single" var="{https://modules.prosody.im/mod_pastebin}max_lines">
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72 <value>12</value>
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73 </field>
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74 <field type="text-single" var="{https://modules.prosody.im/mod_pastebin}max_characters">
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75 <value>1584</value>
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76 </field>
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77 </x>
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78 </query>
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79 </iq>
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80 ```
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81
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82 # Configuration
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83
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84 Option Description
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85 ------------------------- -------------------------------------------------------------------------------------------------------------------------------------------------------------------------
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86 pastebin_threshold Maximum length (in characters) of a message that is allowed to skip the pastebin. (default 500 characters)
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87 pastebin_line_threshold The maximum number of lines a message may have before it is sent to the pastebin. (default 4 lines)
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88 pastebin_trigger A string of characters (e.g. "!paste ") which if detected at the start of a message, always sends the message to the pastebin, regardless of length. (default: not set)
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89 pastebin_ignore A string of characters (e.g. "!nopaste") which if detected **anywhere** within a message, won't send the message to the pastebin
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90 pastebin_expire_after Number of hours after which to expire (remove) a paste, defaults to 24. Set to 0 to store pastes permanently on disk.
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91 pastebin_html_preview Whether to include a formatted preview in pastes (default: true)
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93 # Compatibility
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95 ------- ----------------------
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96 trunk Works as of 25-06-13
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97 13.0 Works
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98 0.12 Works
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99 ------- ----------------------
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101 # Todo
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102
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103 - Maximum paste length
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104 - Web interface to submit pastes?