NBD[1] is another protocol that uses STARTTLS, although as a protocol it's not commonly exposed on the internet (and in fact encryption is not commonly used eit

NBD[1] is another protocol that uses STARTTLS, although as a protocol it's not commonly exposed on the internet (and in fact encryption is not commonly used either since most people are interested in pure performance). We've tried to mitigate the worst effects by reducing the types of message that are permitted before you upgrade to TLS to the bare minimum. [1] https://github.com/NetworkBlockDevice/nbd/blob/master/doc/proto.md https://github.com/NetworkBlockDevice/nbd/blob/master/doc/pr...