diff --git a/Documentation/Filters/Database-Firewall-Filter.md b/Documentation/Filters/Database-Firewall-Filter.md
index e311dd785..ed17b6aa5 100644
--- a/Documentation/Filters/Database-Firewall-Filter.md
+++ b/Documentation/Filters/Database-Firewall-Filter.md
@@ -28,7 +28,10 @@ The database firewall filter has one mandatory parameter, `rules`.
 
 #### `rules`
 
-Absolute path to a file with the rule definitions in it. The file should be readable by the user MariaDB MaxScale is run with.
+A path to a file with the rule definitions in it. The file should be readable by
+the user MariaDB MaxScale is run with. If a relative path is given, the path is
+interpreted relative to the module configuration directory. The default module
+configuration directory is _/etc/maxscale.modules.d_.
 
 #### `action`
 
diff --git a/Documentation/Getting-Started/Configuration-Guide.md b/Documentation/Getting-Started/Configuration-Guide.md
index da292da02..2c94cc660 100644
--- a/Documentation/Getting-Started/Configuration-Guide.md
+++ b/Documentation/Getting-Started/Configuration-Guide.md
@@ -394,6 +394,14 @@ Configure the directory where module configurations are stored. Path arguments
 are resolved relative to this directory. This directory should be used to store
 module specific configurations e.g. dbfwfilter rule files.
 
+Any configuration parameter that is not an absolute path will be interpreted as
+a relative path. The relative paths use the module configuration directory as
+the working directory.
+
+For example, the configuration parameter `file=my_file.txt` would be interpreted
+as `/etc/maxscale.cnf.d/my_file.txt` whereas `file=/home/user/my_file.txt` would
+be interpreted as `/home/user/my_file.txt`.
+
 ```
 module_configdir=/var/lib/maxscale/
 ```
diff --git a/Documentation/Release-Notes/MaxScale-2.1.0-Release-Notes.md b/Documentation/Release-Notes/MaxScale-2.1.0-Release-Notes.md
index 45ae45fdd..7a7e11cc7 100644
--- a/Documentation/Release-Notes/MaxScale-2.1.0-Release-Notes.md
+++ b/Documentation/Release-Notes/MaxScale-2.1.0-Release-Notes.md
@@ -22,6 +22,23 @@ Please see the
 [Configuration Guide](../Getting-Started/Configuration-Guide.md#configuration)
 for details.
 
+### Module configurations
+
+MaxScale 2.1 introduces a new directory for module configurations. This new
+directory can be used to store module specific configuration files.
+
+Any configuration parameter that accepts a path will also support relative
+paths. If a relative path is given, the path is interpreted relative to
+the module configuration directory. The default value is
+_/etc/maxscale.modules.d_.
+
+For example, the `dbfwfilter` rule files could be stored in
+_/etc/maxscale.modules.d/my_rules.txt_ and referred to with
+`rules=my_rules.txt`.
+
+For more details, refer to the documentation of _module_configdir_ in the
+[Configuration Guide](../Getting-Started/Configuration-Guide.md)
+
 ### Logging
 
 Before version 2.1.0, MaxScale created in the log directory a log file