A denial of service (DoS) and Distributed DoS (DDoS) attacks are wide-spread today, and the scale of attacks is constantly increasing which makes it very difficult to mitigate by DIY (do-it-yourself) methods. Even if you are experiencing a 10Mbps DDoS attack, DIY method will fail even with multi-nodes and a balancer. The attacks are growing fast and scale up to several hundred Gbps in size and may even reach 1 Tbps and more. The best way to mitigate DDoS attacks are using a cloud-based Anti-DDoS protection services from a reputable provider.
Regardless of size and traffic of a website, DDoS mitigation is a must for any website owner. Our website, iplocation.net, has been constantly attacked by DDoS and we have been evaluating mitigation services for a while. Among the crowd, we think Incapsula does a great job of protecting our website from DDoS with hassle-free customer service.
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                    Free Trial 
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                       1
                    
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                       1
                    
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                       Yes
                    
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                       Yes
                    
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                       30 Days
                    
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			$199/yr
                    
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                               1
                            
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                               1
                            
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                               Yes
                            
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                               Yes
                            
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                               7 Days
                            
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                               $299/mo
                            
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                               1
                            
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                               Unlimited
                            
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                               Yes
                            
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                               Yes
                            
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                               7 Days
                            
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                               $200/mo
                            
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                               1
                            
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                               1
                            
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                               Yes
                            
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                               Yes
                            
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                               7 Days
                            
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                               Quoted
                            
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                               1
                            
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                               1
                            
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                               Yes
                            
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                               Yes
                            
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                               7 Days
                            
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                               Quoted
                            
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                               1
                            
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                               1
                            
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                               Yes
                            
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                               Yes
                            
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                               7 Days
                            
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                               Quoted
                            
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                               1
                            
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                               1
                            
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                               Yes
                            
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                               Yes
                            
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                               7 Days
                            
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                               Quoted
                            
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                               1
                            
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                               1
                            
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                               Yes
                            
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                               Yes
                            
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                               7 Days
                            
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                               Quoted
                            
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                               1
                            
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                               1
                            
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                               Yes
                            
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                               Yes
                            
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                               7 Days
                            
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                               Quoted
                            
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                            Firewall 
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                               1
                            
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                               1
                            
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                               Yes
                            
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                               Yes
                            
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                               7 Days
                            
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                               Quoted
                            
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There are other well known providers including Arbor, Akamai, CloudFlare and Radware costing from $200 to several thousand dollars per month, and the level of service differs greately.
For small scale DDoS attacks, you may mitigate youreself by securing your server with mod_evasive, mod_security and other WAF (Web Application Firewall) utilities offered by your operating system.
Disclaimer: We receive compensation when a purchase is made from the referred link. Our recommendation is based on our research and positive feedback we received from the users who've used the services.