bugraoz93 commented on PR #55633:
URL: https://github.com/apache/airflow/pull/55633#issuecomment-3299887552

   > Yes, it's working fine at` http://localhost:8080`, but I don't understand 
why we use port 8080—and why, when dealing with the Airflow API or UI, it 
redirects to port `28080` ?
   
   The 8080 is the port that the API server is running on. Docker uses a 
virtual network adapter layer, forwarding port 8080 to 28080 on the actual host 
network adapter connected to the machine. When you are in the container (Breeze 
container in this case), you are on the same network layer where the API is 
running. So that if you are accessing the API from inside of the container we 
uses 8080 for API/UI and if outside of the container (Breeze container in this 
case), it requires IP:28080 where IP can be the local host if you are on your 
machine terminal, local IP if you are in the same local area network, public IP 
(port forwarding, NAT IP) if from the internet.


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