HTTP Monitor with authentication

What authentication method is supported on the web server you are trying to monitor?

Basic Authentication and NTLM/NTLMv2 are supported methods under the HTTP and HTTPS Monitors.

For NTLM to work the web server needs to respond with a 401 response status with a WWW-Authenticate header set to NTLM when it tries to authenticate with Basic Authentication, which it will do first.

https://support.f5.com/csp/article/K2167