sadie@Sorawo13700:~$ gnutls-cli-debug --port 6697 104.152.54.53
GnuTLS debug client 3.8.3
Checking 104.152.54.53:6697
unknown protocol 'ircs-u'
whether the server accepts default record size (512 bytes)... yes
                  whether %ALLOW_SMALL_RECORDS is required... no
|<1>| Received record packet of unknown type 58
                        whether we need to disable TLS 1.2... yes
                             for TLS 1.2 (RFC5246) support... no
                             for TLS 1.3 (RFC8446) support... no
                    for known TLS or SSL protocols support... no