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+++ b/mod_portcheck/README.md	Fri Feb 18 18:35:45 2022 +0100
@@ -0,0 +1,20 @@
+This module adds a `portcheck` command to the [shell][doc:console]
+intended for use with health checks, i.e. to check whether Prosody is
+listening to all expected ports.
+
+# Usage
+
+After installing and enabling the module a command like this becomes
+available:
+
+``` bash
+prosodyctl shell "portcheck [::]:5222 *:5222 [::]:5269 *:5269"
+```
+
+This would check if the c2s (`5222`) and s2s (`5269`) ports are
+available on both IPv6 (`*`) and *Legacy IP*^[often referred to as IPv4].
+
+# Compatibility
+
+Compatible with Prosody **trunk**, will **not** work with 0.11.x or
+earlier.