Unable to call rest endpoint with non-443 port with a httpClient

Question

Trying to call a simple rest point which is run on a different port(non-443) through a console app. This is my code.

using (var httpClient = new HttpClient())
{
    string url = "https://myrestapi.company.com:9443/api/healthcheck";
    using (var response = await httpClient.GetAsync(url))
    {
        string apiResponse = await response.Content.ReadAsStringAsync();
        Console.WriteLine(apiResponse);
    }
}

I tried to run it through Visual Studio and also directly running the exe, but I get an error:

<big>Access Denied (connect_method_denied)</big>
<FONT face="Helvetica">
Your request attempted a CONNECT to a port "9443" that is not permitted by default.
</FONT>
This is typically caused by an HTTPS URL that uses a port other then the default of 443.
</FONT>

I am running on Windows 10 and VS 2019. How do I fix this? Note that on the same machine, I can run it through swagger or even a curl from my git bash.

curl -X GET --header 'Accept: application/json' 'https://myrestapi.company.com:9443/api/healthcheck'

Answer 1

I realized that it was because the url I was hitting was wrong.

I had https://myrestapi.dev.company.com:9443/api/healthcheck

instead of https://myrestapi-dev.company.com:9443/api/healthcheck (Note the - instead of.)

I am not sure why it didn't give me a better error message. Posting it here in case it helps someone else.