doc/hardware-requirements.md

@@ -32,7 +32,8 @@ us](doc/how-to-get-help).
    be waived for disposable servers like build boxes
  * Hosting for the machine: we do not run our own datacenters or rack,
    so it would be preferable if you can also find a hosting location
-   for the machine
+   for the machine, ideally dual-stack (IPv4 and IPv6) and gigabit or
+   greater
 
 ## To avoid