How secure is it?

It's pretty good, better than most hand-made TLS/SSL configurations, out of the box.

As you know, TLSproxy.com is dogfooding TLSproxy...

Now according to Qualys SSLLabs server test (screenshot below), TLSproxy gets an A- grade which is almost perfect... We'll try to fix the forward secrecy problem and avoid using 3DES ciphers.

It will then bring the coveted A+ rating to your websites with absolutely zero configuration!

A- rating on SSLLabs server test

Fork me on GitHub