+$reload_command = "sudo ndc reconfig 2>&1";
+
+# When we consider a signature to have expired and so to be rejected.
+# Intended to help prevent reply attacks. Value is in seconds and the
+# signature can be +/- this many seconds from current time before being
+# rejected.
+$expiry = 7200;
+
+# The directory that secondary zone files live in; we'll create <username>
+# directorys underneath this.
+$zonefiledir = "/var/cache/bind/secondary";