Hyperdeck Ethernet protocol with security

Have someone tried to login using the Ethernet protocol with "Enabled with security only" checked (requires version 8.4)? With just "Enabled" it works and I get the usual 500 connection info but when enabled I get nothing... I tried sending authenticate: but no response

I tried it with telnet, and got the same result as you

I didn't try with anything else, but I couldn't think of anything I could be doing wrong