CloudFlare can help mitigate many DDoS attacks against sites. If you
are having issues with DDoS attacks, here are some quick tips that can
help mitigate an attack:
1. Enable CloudFlare's "I'm Under Attack Mode"in your Security
Settings. All CloudFlare Planshave this Basic DDoS Protection
available available in their CloudFlare Security Settings.
Need more advanced DDoS Protection?Please look at CloudFlare's
Business and Enterprise plans.
2. If you don't want to enable "I'm Under Attack Mode", because some
visitors with JavaScript and Cookies disabled won't be able to access
the site, then you can change your Basic Security Level in your
CloudFlare settings to High. A 'High' security settings will challenge
more visitors coming to your site, and will thwart many visits from a
botnet from even hitting your server.
3. If you know which countries are sending most of the bot traffic to
your site, you can block them in your CloudFlare Threat Control panel.
A blockwill challenge all visitors from that country, which means only
visitors that pass the captcha can enter your site. You also have the
option of blocking by individual IP or IP ranges in your Threat
Control panel, if desired.
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