@techreport{kristoff-opsec-port-filtering-00,
    number =    {draft-kristoff-opsec-port-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-kristoff-opsec-port-filtering/00/},
    author =    {John Kristoff and Fernando Gont},
    title =     {{Port Filtering Considerations}},
    pagetotal = 21,
    year =      2010,
    month =     mar,
    day =       1,
    abstract =  {This document provides advice and technical guidance for ISP port filtering.},
}