Curl not connecting to Azure Monitor

Question

Hello,

I am testing a connection from a container to Azure Monitor using curl but all the options I have tried so far have failed. I have confirmed that the connection is fine from my virtual network because I can successfully run tests with PowerShell (ping and test-netconnection) but I cannot figure out why curl is not working.

Can anyone tell me if Azure Monitor can respond to curl requests? Or help me understand what I might be doing wrong? Thank you.

Answer 1

@Bombbe, thank you for posting the question and apologies for the delayed response.

Note that the tools used in the question all have different utilities. Ping/Test-connection only verifies whether the URL is reachable or not. They both use ICMP echo protocol to ensure that the endpoint is reachable. For details, see Test-Connection

Curl on the other hand, is used for data transfer. In the screenshot shared in the question, the connection does go through with Curl as well (as it says - connected to global...), however there are no authentication or data transfer being done there in the format that endpoint requires. Hence the connection gets reset (Recv failure: Connection was reset). In short, the endpoint only had to do a simple reply back for ping/test-connection which does not involve data transfer. But curl initiated a data transfer protocol (TCP) and because the server did not get the request in required format, it simply resets the connection back.

Hope this helps.

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