KNX binding in docker on synology

Hello,

I am trying to run OH in a docker container on my new DS916+ with the official oh2.3 snapshot amd64 debian image.

But OH cant connect to knx bus. I use the same configuration settings for knx binding as my running 1.8 instance. My Weinzierl 730 IP gateway can run 5 connections. All other instances which are accassing bus are stopped and I also restarted the IP gateway.
I also tested with localIp setting (host IP and 172.17.x.x docker internal IP), but it doesnt work.

Could anybody please share a working configuration?

knx.cfg

ip=192.168.100.80
ignorelocalevents=true
type=TUNNEL

openhab.log

2018-02-10 16:27:40.161 [INFO ] [nx.internal.connection.KNXConnection] - KNX link will be retried in 30 seconds
2018-02-10 16:28:10.157 [INFO ] [nx.internal.connection.KNXConnection] - Trying to (re-)connect to KNX...
2018-02-10 16:28:10.158 [ERROR] [nx.internal.connection.KNXConnection] - Error connecting to KNX bus: on connect to /192.168.100.80:3671
2018-02-10 16:28:10.160 [INFO ] [nx.internal.connection.KNXConnection] - KNX link will be retried in 30 seconds
2018-02-10 16:28:10.158 [ERROR] [tuwien.auto.calimero                ] - KNXnet/IP Tunneling 192.168.100.80:3671: communication failure on connect
java.net.BindException: Cannot assign requested address (Bind failed)
	at java.net.PlainDatagramSocketImpl.bind0(Native Method) ~[?:?]
	at java.net.AbstractPlainDatagramSocketImpl.bind(AbstractPlainDatagramSocketImpl.java:93) [?:?]
	at java.net.DatagramSocket.bind(DatagramSocket.java:392) [?:?]
	at java.net.DatagramSocket.<init>(DatagramSocket.java:242) [?:?]
	at tuwien.auto.calimero.knxnetip.ClientConnection.connect(ClientConnection.java:147) [221:org.openhab.binding.knx:1.12.0.201802080210]
	at tuwien.auto.calimero.knxnetip.KNXnetIPTunnel.<init>(KNXnetIPTunnel.java:131) [221:org.openhab.binding.knx:1.12.0.201802080210]
	at tuwien.auto.calimero.link.KNXNetworkLinkIP.<init>(KNXNetworkLinkIP.java:142) [221:org.openhab.binding.knx:1.12.0.201802080210]
	at org.openhab.binding.knx.internal.connection.KNXConnection.connectByIp(KNXConnection.java:292) [221:org.openhab.binding.knx:1.12.0.201802080210]
	at org.openhab.binding.knx.internal.connection.KNXConnection.connect(KNXConnection.java:179) [221:org.openhab.binding.knx:1.12.0.201802080210]
	at org.openhab.binding.knx.internal.connection.KNXConnection$ConnectTimerTask.run(KNXConnection.java:520) [221:org.openhab.binding.knx:1.12.0.201802080210]
	at java.util.TimerThread.mainLoop(Timer.java:555) [?:?]
	at java.util.TimerThread.run(Timer.java:505) [?:?]

solved by myself :sunglasses:

usenat=true should be set in knx.cfg