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Close port 80 in external static IP

Hello. I created a static external IP. And after created. It's not used by any load balancer, ... But when I check port open with Nmap. Port 80 is opening? How can I close port 80 in static external IP? Can you guys can help me. Here is the case

- This IP doesn't use by any service. Port 80 is open.
- Next, I use this IP in GKS ingress and open only port 443 for HTTPS. GKS ingress created a load balancer with Front End HTTPS. But when I check port 80. It's still open.

@huu_nv 

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