annotate mod_limit_auth/README.markdown @ 5536:96dec7681af8

mod_firewall: Update user marks to store instantly via map store The original approach was to keep marks in memory only, and persist them at shutdown. That saves I/O, at the cost of potentially losing marks on an unclean shutdown. This change persists marks instantly, which may have some performance overhead but should be more "correct". It also splits the marking/unmarking into an event which may be watched or even fired by other modules.
author Matthew Wild <mwild1@gmail.com>
date Thu, 08 Jun 2023 16:20:42 +0100
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children
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1 ---
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2 summary: Throttle authentication attempts with optional tarpit
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3 ...
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4
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5 Introduction
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6 ============
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7
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8 This module lets you put a per-IP limit on the number of failed
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9 authentication attempts.
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10
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11 It features an optioanal
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12 [tarpit](https://en.wikipedia.org/wiki/Tarpit_%28networking%29), i.e.
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13 waiting some time before returning an "authentication failed" response.
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15 Configuration
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16 =============
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17
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18 ``` {.lua}
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19 modules_enabled = {
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20 -- your other modules
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21 "limit_auth";
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22 }
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23
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24 limit_auth_period = 30 -- over 30 seconds
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25
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26 limit_auth_max = 5 -- tolerate no more than 5 failed attempts
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27
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28 -- Will only work with Prosody trunk:
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29 limit_auth_tarpit_delay = 10 -- delay answer this long
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30 ```
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31
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32 Compatibility
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33 =============
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34
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35 Requires 0.9 or later. The tarpit feature requires Prosody trunk.