Update Scale Set LBalancer with inbound rules

Hello,

I'm trying to update the load balancer and instance with new inbound rule but it doesn't work.

Steps I have taken:

1. Add NAT pool to LB:

az network lb inbound-nat-pool create --backend-port 27020 --frontend-port-range-end 27021 --frontend-port-range-start 27020 --name AllowRawGameClient --protocol Tcp --resource-group vmss-ark-survival-rg --lb-name ArkSurvivallb

3. Run upgrade on instance

4. Inbound rule is created in the dashboard under load balancer inbound rules, but when I test with telnet from remote is not connecting.

Can someone help please why I cant reach the port even if it's opened?