@misc{rfc6887,
    series =    {Request for Comments},
    number =    6887,
    howpublished =  {RFC 6887},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC6887},
    url =       {https://www.rfc-editor.org/info/rfc6887},
    author =    {Dan Wing and Stuart Cheshire and Mohamed Boucadair and Reinaldo Penno and Paul Selkirk},
    title =     {{Port Control Protocol (PCP)}},
    pagetotal = 88,
    year =      2013,
    month =     apr,
    abstract =  {The Port Control Protocol allows an IPv6 or IPv4 host to control how incoming IPv6 or IPv4 packets are translated and forwarded by a Network Address Translator (NAT) or simple firewall, and also allows a host to optimize its outgoing NAT keepalive messages.},
}