The M-line M: { your DNSNAME { your password }} The DNS name is the name that you did sign up for. The password contains 8 numbers/letters 1-9 A-F
The D-line. D :{ DNSNAME { PORT1 PORT2 { password { share level 2 x }}}}
The DNSNAME is the name the one you are going to share with is using. PORT1 is the port you are using yourself 5566. That port has to be opened in your router. PORT2 is the port the person you are going to share with is using. This port has to be opened in his router. Password, this has to be the same as in his M-line. The share levels: by this line you allow the card to be shared by one or more users.