Hi all!
When a new user try to write the Alias name to create an account get this message:

Connection closed by foreign host

... and the connection ends.
In Mystic, New User Settings Menu I have:

Allow New Users: Yes
Security: 20
Password:
New User Feedback: Yes
Use Usa Phone: No
User Format: As Typed
Start Msg Group: 2
Start File Group: 2

What I am missing?
Thanks ...

*Sotano Msx BBS*
telnet sotanomsxbbs.org:23
<Ultimo usuario activo de Msx en Ibiza>

--- Mystic BBS v1.12 A46 2020/08/26 (Raspberry Pi/32)
* Origin: Sotano Msx BBS (21:1/150)