EZ webscoket multi instance is not working in onprem

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Hello,   I have a chat box in my application, for which i have implemented EZwebsocket multiinstance. This websocket is working fine in local environment , But if i deploy the code in my server , i am not getting live message. I tried debugging, Listner microflow is not getting triggered. Is there any specific url rewrite for any port opening needs to be done in onprem environment. I added some logs in the Java action, I can see that in my local subcription list has value but in my on premise subscription list is empty. I have attached a screenshot of my local and on prem   LOCAL:   OnPrem
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