Memcached server have 2 type of remote connection, with SASL(Secure connection) or without(Direct remote connection).
Direct connection without SASL:
For direct remote connection you should specify host and port.
Direct connection with SASL:
For direct remote connection with SASL you should specify host and port like in previous example, but also should be entered user name and password.
When all fields entered you can test your connection via test button.