%% You should probably cite rfc7710 instead of this I-D.
@techreport{wkumari-dhc-capport-01,
    number =    {draft-wkumari-dhc-capport-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-wkumari-dhc-capport/01/},
    author =    {Warren "Ace" Kumari and Ólafur Guðmundsson and P Ebersman and Steve Sheng},
    title =     {{Captive-Portal identification in DHCP}},
    pagetotal = 9,
    year =      2014,
    month =     jan,
    day =       23,
    abstract =  {In many environments (such as hotels, coffee shops and other establishments that offer Internet service to customers), it is common to start new connections in a captive portal mode, i.e. highly restrict what the customer can do until the customer has accepted terms of service, provided payment information or authenticated. This document describes a DHCP option to inform clients that they are behind some sort of captive portal device, and that they will need to authenticate to get Internet Access.},
}