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after recent POODLE vulnerability I am going around and checking all my servers are configured correctly.

Configuration is usually easy, almost all services have a way to set which protocols are enabled.

However, I can't find how to verify that the connection can't be downgraded to SSL and the actual list of supported protocols that the server will offer and will accept.

I tried with fiddler but just say it's https, I tried in chrome connecting and it say TLS, but browsers automatically select the best available option.

Is there a way to initiate a connection and test either which protocol are supported or if SSL protocol can be used?

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openssl s_client -connect <server>:<port> -ssl3

If the connection succeeds, sslv3 is enabled. If it fails, it is disabled. When it fails you should see something like:

error:14094410:SSL routines:SSL3_READ_BYTES:sslv3 alert handshake failure

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