Laserfiche Forms Professional version 10.4 (Forms is already configured on DMZ and accessible/working using the URL https://dforms.seera.sa/forms  without issue)

Using Windows Server 2012 R2 Standard

We are trying to configure Laserfiche Notification services (Hub & Master) for forms using this  documentation link. Two of the below commands were successful. In first command, just certstorename was added because our certificate resides in Web Hosting.

netsh http add sslcert ipport=0.0.0.0:8181 certstorename=WebHosting certhash=ecb0cec321853313e012349b6095974811b99677 appid={54dedb8b-c191-4c61-8444-0b7a61d87f40}

netsh http add urlacl url=https://*:8181/ user="LOCAL SERVICE" listen=yes

Configurations in Laserfiche Forms were also set as below. No errors or issues are found in Event Viewer of Forms Operational or LFNotificationService. We are able to see last message that "Master service initialized."

Problem:

What's happening is that notifications are working when we browse forms URL on server as we can see the notification numbers beside open tasks. But when the same forms URL is browsed from outside of the server, notifications does not work. Based on our findings from browser network traffic (by F12 option), one of the URL (https://dforms.seera.sa:8181/signalr/hubs?_=1653902459120 ) is not accessible when we browse from outside of the server.

On the server, notifications work.

Outside of the server, notification doesn't work. We are seeing below error in network traffic of the browser.

Any clue on how we can resolve this issue. Are there any other settings or configurations required in our case?