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mod_host_guard/README.markdown

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mod_host_guard/README.markdown @ 5877:97c9b76867ca

mod_log_ringbuffer: Detach event handlers on logging reload (thanks Menel) Otherwise the global event handlers accumulate, one added each time logging is reoladed, and each invocation of the signal or event triggers one dump of each created ringbuffer.
author Kim Alvefur <zash@zash.se>
date Sun, 03 Mar 2024 11:23:40 +0100
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1 ---
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2 labels:
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3 - 'Stage-Stable'
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4 summary: Granular remote host blacklisting plugin
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5 ...
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7 Details
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8 =======
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9
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10 As often it's undesiderable to employ only whitelisting logics in public
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11 environments, this module let's you more selectively restrict access to
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12 your hosts (component or server host) either disallowing access
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13 completely (with optional exceptions) or blacklisting certain sources.
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15 Usage
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16 =====
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18 Copy the plugin into your prosody's modules directory. And add it
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19 between your enabled modules into the global section (modules\_enabled):
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21 - The plugin can work either by blocking all remote access (s2s) to a
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22 certain resource with optional exceptions (useful for components)
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23 - Or by selectively blocking certain remote hosts through blacklisting
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24 (by using host\_guard\_selective and host\_guard\_blacklisting)
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26 Configuration
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27 =============
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29 Option name Description
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30 ----------------------------------- ---------------------------------------------------------------------------------------------------
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31 host\_guard\_blockall A list of local hosts to protect from incoming s2s
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32 host\_guard\_blockall\_exceptions A list of remote hosts that are always allowed to access hosts listed in host\_guard\_blockall
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33 host\_guard\_selective A list of local hosts to allow selective filtering (blacklist) of incoming s2s connections
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34 host\_guard\_blacklist A blacklist of remote hosts that are not allowed to access hosts listed in host\_guard\_selective
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36 Example
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37 -------
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38
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39 ``` {.lua}
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40
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41 host_guard_blockall = { "no_access.yourhost.com", "no_access2.yourhost.com" } -- insert here the local hosts where you want to forbid all remote traffic to.
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42 host_guard_blockall_exceptions = { "i_can_access.no_access.yourhost.com" } -- optional exceptions for the above.
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43 host_guard_selective = { "no_access_from_blsted.myhost.com", "no_access_from_blsted.mycomponent.com" } -- insert here the local hosts where you want to employ blacklisting.
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44 host_guard_blacklist = { "remoterogueserver.com", "remoterogueserver2.com" } -- above option/mode mandates the use of a blacklist, you may blacklist remote servers here.
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45 ```
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46
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47 The above is updated when the server configuration is reloaded so that
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48 you don't need to restart the server.
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50 Compatibility
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51 =============
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52
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53 - Works with 0.8.x, successive versions and trunk.