%% You should probably cite rfc8019 instead of this I-D.
@techreport{ietf-ipsecme-ddos-protection-01,
    number =    {draft-ietf-ipsecme-ddos-protection-01},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-ietf-ipsecme-ddos-protection/01/},
    author =    {Yoav Nir and Valery Smyslov},
    title =     {{Protecting Internet Key Exchange (IKE) Implementations from Distributed Denial of Service Attacks}},
    pagetotal = 25,
    year =      2015,
    month =     mar,
    day =       9,
    abstract =  {This document recommends implementation and configuration best practices for Internet-connected IPsec Responders, to allow them to resist Denial of Service and Distributed Denial of Service attacks. Additionally, the document introduces a new mechanism called "Client Puzzles" that help accomplish this task.},
}