Does Stunnel support non-encrypt connection?

Question

1 question about Stunnel. I would like to use Stunnel as a FIX (Financial Information eXchange) gateway for internet, to support both SSL and non-SSL connection. Is Stunnel able to do without any encryption? I just had a try with plain socket but it looked Stunnel rejected the connection saying 'invalid protocol' or something.

Answer 1

It's possible to use SSL/TLS without encryption using cipher suites with null encryption (e.g. TLS_RSA_WITH_NULL_SHA), which are normally disabled by default, but could be set via the ciphers option of Stunnel. However, you would still be using SSL/TLS, which isn't what you seem to be looking for.

It looks like you're more generally looking for what's usually called a TCP bouncer. You should be able to find a number of implementations around.