%% You should probably cite draft-ietf-opsec-icmp-filtering instead of this I-D.
@techreport{gont-opsec-icmp-filtering-00,
    number =    {draft-gont-opsec-icmp-filtering-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-gont-opsec-icmp-filtering/00/},
    author =    {Fernando Gont and Guillermo Gont},
    title =     {{Recommendations for filtering ICMP messages}},
    pagetotal = 36,
    year =      2008,
    month =     mar,
    day =       30,
    abstract =  {This document document provides advice on the filtering of ICMPv4 and ICMPv6 messages. Additionaly, it discusses the operational and interoperability implications of such filtering.},
}