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annotate mod_log_auth/README.markdown @ 4877:adc6241e5d16

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mod_measure_process: Report the enforced limit The soft limit is what the kernel actually enforces, while the hard limit is is how far you can change the soft limit without privileges. Unless the process dynamically adjusts the soft limit, knowing the hard limit is not as useful as knowing the soft limit. Reporting the soft limit and the number of in-use FDs allows placing alerts on expressions like 'process_open_fds / process_max_fds >= 0.95'
author Kim Alvefur <zash@zash.se>
date Tue, 18 Jan 2022 18:55:20 +0100
parents a47520a2c59d
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: Log failed authentication attempts with their IP address
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5 ...
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6
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7 Introduction
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8 ============
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9
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10 Prosody doesn't write IP addresses to its log file by default for
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11 privacy reasons (unless debug logging is enabled).
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13 This module enables logging of the IP address in a failed authentication
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14 attempt so that those trying to break into accounts for example can be
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15 blocked.
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17 fail2ban configuration
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18 ======================
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19
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20 fail2ban is a utility for monitoring log files and automatically
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21 blocking "bad" IP addresses at the firewall level.
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22
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23 With this module enabled in Prosody you can use the following example
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24 configuration for fail2ban:
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26 # /etc/fail2ban/filter.d/prosody-auth.conf
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27 # Fail2Ban configuration file for prosody authentication
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28 [Definition]
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29 failregex = Failed authentication attempt \(not-authorized\) for user .* from IP: <HOST>
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30 ignoreregex =
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32 And at the appropriate place (usually the bottom) of
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33 /etc/fail2ban/jail.conf add these lines:
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35 [prosody]
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36 enabled = true
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37 port = 5222
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38 filter = prosody-auth
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39 logpath = /var/log/prosody/prosody*.log
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40 maxretry = 6
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42 Compatibility
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43 -------------
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44
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45 ------- --------------
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46 trunk Works
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47 0.9 Works
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48 0.8 Doesn't work
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49 ------- --------------