-If "any" is selected, then the listening sockets will be IPv6 sockets,
-but on most platforms those will also accept IPv4 connections.
+If "any" is selected, then depending on the operating system
+both IPv4 and IPv6 or just IPv6 listening sockets will be created.
+
+Mixing IPv4 and IPv6 may not work as desired.
+It's best to choose one address family
+and use that for all tinc daemons on the VPN.