+@cindex UDPDiscovey
+@item UDPDiscovery = <yes|no> (yes)
+When this option is enabled tinc will try to establish UDP connectivity to nodes,
+using TCP while it determines if a node is reachable over UDP. If it is disabled,
+tinc always assumes a node is reachable over UDP.
+Note that tinc will never use UDP with nodes that have TCPOnly enabled.
+
+@cindex UDPDiscoveryKeepaliveInterval
+@item UDPDiscoveryKeepaliveInterval = <seconds> (9)
+The minimum amount of time between sending UDP ping datagrams to check UDP connectivity once it has been established.
+Note that these pings are large, since they are used to verify link MTU as well.
+
+@cindex UDPDiscoveryInterval
+@item UDPDiscoveryInterval = <seconds> (2)
+The minimum amount of time between sending UDP ping datagrams to try to establish UDP connectivity.
+
+@cindex UDPDiscoveryTimeout
+@item UDPDiscoveryTimeout = <seconds> (30)
+If tinc doesn't receive any UDP ping replies over the specified interval,
+it will assume UDP communication is broken and will fall back to TCP.
+
+@cindex UDPInfoInterval
+@item UDPInfoInterval = <seconds> (5)
+The minimum amount of time between sending periodic updates about UDP addresses, which are mostly useful for UDP hole punching.
+