System.net.webexception - The Remote Server Returned An Error -502- Bad Gateway ((link))

In IIS (Application Request Routing): Increase the "timeout (seconds)" on the server farm proxy settings.

catch (System.Net.WebException ex) { if (ex.Response != null) { // Check the headers for clues (e.g., is it Nginx? Cloudflare?) string serverHeader = ex.Response.Headers["Server"]; Console.WriteLine($"Proxy Server: serverHeader"); // Read the response body if available (sometimes contains HTML error details) using (var reader = new In IIS (Application Request Routing): Increase the "timeout

Configure the gateway to only forward traffic to healthy upstream servers (active/passive health checks). Console.WriteLine($"Proxy Server: serverHeader")

This logs all request/response headers and can reveal if the gateway is returning 502 due to a client-side issue. In IIS (Application Request Routing): Increase the "timeout

System.Net.WebException: The remote server returned an error (502) Bad Gateway.

In NGINX: