%% You should probably cite draft-wing-dnsop-structured-dns-error-page instead of this I-D.
@techreport{reddy-dnsop-error-page-01,
    number =    {draft-reddy-dnsop-error-page-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-reddy-dnsop-error-page/01/},
    author =    {Tirumaleswar Reddy.K and Neil Cook and Dan Wing and Mohamed Boucadair},
    title =     {{DNS Access Denied Error page}},
    pagetotal = 10,
    year =      ,
    month =     ,
    day =       ,
    abstract =  {When a DNS server filters a query the response conveys no detailed explanation of why the query was blocked, leading to end-user confusion. This document defines a method to return an URL that explains the reason the DNS query was filtered.},
}