Problem in Discovering devices in a network from docker container running in Ubuntu 18

[Zedstron]

Hi, I wrote a console application which can discover the devices using WhoIs/IAM and can read properties from objects, but it is completely working fine in windows, but when a container is executed in Linux ubuntu 18, only BACnet/IP devices are discovered and the devices that are behind a MS/TP over IP are not discovered. e.g. devices with same/different network number and unique ID's but same Ip address

Host Machine Config

• Ubuntu 18.04
• Multiple Interfaces e.g. (eth0 for BACnet, eth1 for internet, eth2 for private VPN)
• Docker container for solution execution

Docker Config

• Networking mode Host
• exposed port 47808

BACnet Server Config

• Used specific Ip and not 0.0.0.0
• Port used 0XBAC0
• Fragmentation enabled
• Use Exclusive port enabled

[Zedstron]

I would like to add one thing, I used tshark to test the packets just in case the IAM responses are received from the equipment's but not get processed by the app, but tshark only shows the response from those devices being detected and not other equipment's

[Zedstron]

This is another update I just noticed that Wireshark is showing IAM responses are being captured from other equipment's too, but they are sent as broadcast which is not being processed but the responses which are sent as unicast, they get processed.
One more thing to add when destination is broadcast address then the UDP receive message handler is not even fired, I though message is being received in some stage and get either trashed or rejected due to some reason but it's not the case.