Unable to send message to Service Bus Queue

Hi,

I am following the below MS link to create my first client application that could send messages to Service Bus Queue. I am a beginner to start using Service Bus.

https://docs.microsoft.com/en-us/azure/service-bus-messaging/service-bus-dotnet-get-started-with-queues

I have followed the instructions as specified above and I am using VS 2019 and Microsoft.Azure.ServiceBus to create my client application. When I run my console application I get the below error, which I think is a firewall issue as I am running it from my work station.

Exception: No connection could be made because the target machine actively refused it ErrorCode

While googling I found the below link which says, the connection to the Service bus queue is via TCP port 5671/5672.

https://serverfault.com/questions/918615/message-could-not-be-send-to-a-azure-cloud-message-queue 

Can someone suggest if that's true, then I will ask our network team to open these two ports on the Firewall. If you have any other suggestions then please let me know.

Regards

Biranchi