[Zinka]

Cloud Flare provides is good service in "box", all features depend on a set plans category, free plan not include in-depth settings anti-ddos/anti-syn-scan/anti-scan-folders/etc.
This is nice, BUT cloud flare not secure because their country registration is USA and they cooperate with AKAMAI and provide access to traffic for special agency's, boom(.)
I think for all underground forums need use private/their developments system anti ddos and others software.