net core 3.1 deploy iis https HTTP Error 502.3 - Bad Gateway A connection with the server could not be established

Fredy Hernandez Orozco 1

I am deploying an api in .net core 3.1 in a vpn in windows server 2019 with iis.

When making the http request, only the api works correctly.

when I add the https address it fails for both http or https

error

502 - Web server received an invalid response while acting as a gateway or proxy server.
There is a problem with the page you are looking for, and it cannot be displayed. When the Web server (while acting as a gateway or proxy) contacted the upstream content server, it received an invalid response from the content server.

Sam Wu-MSFT 7,536 Reputation points Microsoft Vendor

2022-03-21T02:13:52.613+00:00

@Fredy Hernandez Orozco

502 - Web server received an invalid response while acting as a gateway or proxy server.
502.3 - Bad Gateway A connection with the server could not be establishe.

According to your description, I couldn’t understand your requirement clearly. why are there two different errors?

when I add the https address it fails for both http or https

It may be caused by the firewall, I suggest you turn off the firewall and try again.

1 answer

Fredy Hernandez Orozco 1 Reputation point

2022-03-21T04:20:36.603+00:00

yes firewall is off

This is the error log

Fields: date time s-ip cs-method cs-uri-stem cs-uri-query s-port cs-username c-ip cs(User-Agent) cs(Referer) sc-status sc-substatus sc-win32-status time-taken

2022-03-21 04:06:41 85.215.208.137 POST /api/login X-ARR-CACHE-HIT=0&X-ARR-LOG-ID=03ef1bb2-5635-40ed-a7bb-21e57411eb87 40443 - 85.215.208.137 PostmanRuntime/7.29.0 - 502 3 12029 1023
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Sam Wu-MSFT 7,536 Reputation points Microsoft Vendor

2022-03-22T09:59:44.393+00:00

@Fredy Hernandez Orozco It can be seen from the error log that it is a 502.3 error. I suggest you use the failed request trace or check the Event Viewer for detailed error information.
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net core 3.1 deploy iis https HTTP Error 502.3 - Bad Gateway A connection with the server could not be established

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Fields: date time s-ip cs-method cs-uri-stem cs-uri-query s-port cs-username c-ip cs(User-Agent) cs(Referer) sc-status sc-substatus sc-win32-status time-taken

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