F5 Health Monitor Receive String as JSON

Thank you Kay.

First we have to fix the send string.

We tested the send string with OpenSSL and we received 200 ok

echo -e "GET /api/v1/system/services/status?service_names=nae-kmip HTTP/1.1\r\nHost: 10...***.\r\nConnection: Close\r\n\r\n";sleep 1) | openssl s_client -connect 10...***.:443

--
HTTP/1.1 200 OK
Date: Mon, 11 Nov 2024 18:24:32 GMT
Content-Type: application/json; charset=UTF-8

:

{"status":"started","services":[{"name":"nae-kmip","status":"started"}]}

However, adding this string into F5 Health Monitor Send Field:

GET /api/v1/system/services/status?service_names=nae-kmip HTTP/1.1\r\nConnection: Close\r\n\r\

We receive 400 [Bad Request].

So what is the difference running from the box/Linux CMD with OpenSSL and running from F5 Application?

Is there setting in F5 we are missing?

Please advise.

Thanks.