Cipher DEFAULT:!TLSv1 ?

It means: Use default ciphers but hard-disabe all ciphers for TLSv1, effectively making TLSv1 unusable. A better way of disabling the protocol is to use "options" in your ssl profile. There have been some very good articles about ciphers in the past few days in devcentral's article section.

Edit:

See Cipher Suite Practices and Pitfalls .