weakCert: RSA 1536 bit, deprecated crypto and refused by OpenSSL in Debian/Ubuntu
noSNI: Server refuses connections with an unencrypted servername (SNI extension). Client doesn't send servername.
Use -nosevername with openssl and --disable-sni with gnutls-cli.
To connect to a TLS node with binkd uou can use the gnutls-cli or openssl command line utility with the -pipe parameter, e.g.: