[DanBlake]

A article I wrote on attempting to do this yourself (without cloudflare/other services) is here: http://harknesslabs.com/post/38104429912/fighting-spoofed-sy...

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)

[pki]

Cloudflare lets you announce your own IP space through their serivce on non-personal plans don't they?

[vox_mollis]

Not that I'm aware of. You're thinking of GRE tunnel DDoS mitigation providers like staminus and blacklotus.

[asherkin]

You need an Enterprise plan for that unfortunately, it's not even included in Business.

[rmdoss]

Starts at $5k per month last time I checked.