A article I wrote on attempting to do this yourself (without cloudflare&#x2F;other services) is here: <a href="http:&#x2F;&#x2F;harknesslabs.com&#x2F;post&#x2F;38104429912&#x2F;fighting-spoofed-syn-and-udp-floods" rel="nofollow">http:&#x2F;&#x2F;harknesslabs.com&#x2F;post&#x2F;38104429912&#x2F;fighting-spoofed-sy...</a><p>Its much easier to use cloudflare, but sometimes it just not possible to use them (it wasnt for us, due to needing hardcoded IPs in our DC)