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annotate mod_block_registrations/README.md @ 6404:a1df76ba4f68

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mod_block_registrations: Add username length requirements
author Kim Alvefur <zash@zash.se>
date Sat, 14 Feb 2026 12:57:22 +0100
parents f110bce35630
children cdb9c2616c05
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1 Introduction
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2 ============
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3
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4 On a server with public registration it is usually desirable to prevent
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5 registration of certain "reserved" accounts, such as "admin".
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7 This plugin allows you to reserve individual usernames, or those
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8 matching certain patterns. It also allows you to ensure that usernames
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9 conform to a certain pattern.
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11 Configuration
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12 =============
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13
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14 Enable the module as any other:
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16 modules_enabled = {
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17 "block_registrations";
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18 }
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19
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20 You can then set some options to configure your desired policy:
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21
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22 Option Default Description
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23 ------------------------------------ ------------------- -----------------------------------------------------------------------------------------------------------------------------------------------
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24 block_registrations_users *See source code* A list of reserved usernames
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25 block_registrations_matching `{ }` A list of [Lua patterns](http://www.lua.org/manual/5.1/manual.html#5.4.1) matching reserved usernames (slower than block_registrations_users)
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26 block_registrations_require `nil` A pattern that registered user accounts MUST match to be allowed
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27 block_registrations_confusable `true` Block usernames that look similar to the reserved usernames (requires Prosody be built with ICU)
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28 block_registrations_length_minimum `1` Block usernames that are shorter than the given length
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29 block_registrations_length_maximum `255` Block usernames that are longer than the given length
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31 Some examples:
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32
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33 block_registrations_users = { "admin", "root", "xmpp" }
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34 block_registrations_matching = {
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35 "master$" -- matches anything ending with master: postmaster, hostmaster, webmaster, etc.
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36 }
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37 block_registrations_require = "^[a-zA-Z0-9_.-]+$" -- Allow only simple ASCII characters in usernames
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38
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39 Compatibility
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40 =============
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42 ------ -------
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43 13.0 Should work (please test)
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44 0.12 Works
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45 ------ -------