Connecting to the ESXi Web interface (https://esxi/ui) fails.
You see entries as below to:
503 Service Unavailable (Failed to connect to endpoint: [N7Vmacore4Http16LocalServiceSpecE:0x04d36508] _serverNamespace = / action = Allow _port = 8309)
— When we check the file /etc/vmware/rhttpproxy/endpoints.conf found that there few additional lines added (below Snippet from my lab) which was causing this issue.
Take a backup of endpoints.conf file
Delete below line from /etc/vmware/rhttpproxy/endpoints.conf file and restart ESXi host management services.
/ remote 10.170.2.2.3128 allow allow
After changes, endpoints.conf file should look like:
Now we should be able to login, on the ESXi host web interface.