%% You should probably cite draft-ietf-acme-ip instead of this I-D.
@techreport{shoemaker-acme-ip-00,
    number =    {draft-shoemaker-acme-ip-00},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-shoemaker-acme-ip/00/},
    author =    {Roland Bracewell Shoemaker},
    title =     {{ACME IP Identifier Validation Extension}},
    pagetotal = 6,
    year =      2017,
    month =     mar,
    day =       27,
    abstract =  {This document specifies identifiers and challenges required to enable the Automated Certificate Management Environment (ACME) to issue certificates for IP addresses.},
}