-This can be used to listen only to an internal interface and thus have less
-exposure to the public internet:
+Setting the `sysctl` `net.ipv6.bindv6only` to the non-default `1` will cause
+the daemons to only accept connection from IPv6 clients, while usually also
+causing lots of other issues. If you set this configuration we recommend to
+either remove the `sysctl` setting, or set the `LISTEN_IP` to `0.0.0.0` (which
+will only allow IPv4 clients).
+
+`LISTEN_IP` can be used to only to restricting the socket to an internal
+interface and thus have less exposure to the public internet, for example: