When a client uses a hostname which is not in the configuration file, Stargazer shuts down the connection with a TLS alert.
It seems to me that a nice 53 would be better (all other servers do that).
Example:
% agunua gemini.bortzmeyer.org [OK] [On the same machine:] % agunua radia.bortzmeyer.org Network problem, TLS handshake error <class 'OpenSSL.SSL.Error'>: problem in the certificate? "[('SSL routines', 'ssl3_read_bytes', 'tlsv1 alert access denied')]".
Good catch! I'll fix that when I have time.
Fixed in main