+[@KNOCK]
+@inherit = @ACTIVE, @WATCH
+
+;; keepalive: how often to send NOP packets to keep the connection alive, at
+;; least in the minds of intermediate stateful firewalls and NAT routers.
+keepalive = 2m
+
+;; every: interval for checking that this connection is alive.
+every = 30s
+
+;; knock: peer-name string to send to the peer.
+knock = $(myhost)
+