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\begin{frame}[t,plain]
    \titlepage
\end{frame}

\begin{frame}[t]{Background and History}
\begin{itemize}
\item In 2005, Florian Weimer described Passive DNS replication at the 17th FIRST annual conference
\item Nowadays Passive DNS software are created\footnote{To our knowledge, there are more than 15 software implementations} and used worldwide
\item In 2011, we started to work on a common output format for Passive DNS systems at the FIRST annual conference
\item After discussions with many authors of passive DNS, version 02 of the internet-draft is published
\end{itemize}
\end{frame}

\begin{frame}[t]{Main objectives of the internet-draft}
\begin{itemize}
\item Consistent naming of fields across Passive DNS software based on the most common Passive DNS implementations
\item Minimal set of fields to be supported
\item Minimal set of optional fields to be supported
\item Way to add "additional" fields via a simple registry mechanism (IANA-like)
\item Simple and easily parsable format
\item A gentle reminder regarding privacy aspects of Passive DNS
\end{itemize}
\end{frame}

\begin{frame}[t,fragile]{Sample output www.terena.org}
\lstdefinelanguage{JavaScript}{
  keywords={typeof, new, true, false, catch, function, return, null, catch, switch, var, if, in, while, do, else, case, break},
  keywordstyle=\color{blue}\bfseries,
  ndkeywords={class, export, boolean, throw, implements, import, this},
  ndkeywordstyle=\color{darkgray}\bfseries,
  identifierstyle=\color{black},
  sensitive=false,
  comment=[l]{//},
  morecomment=[s]{/*}{*/},
  commentstyle=\color{purple}\ttfamily,
  stringstyle=\color{red}\ttfamily,
  morestring=[b]',
  morestring=[b]"
}

\lstset{
   language=JavaScript,
   backgroundcolor=\color{lightgray},
   extendedchars=true,
   basicstyle=\footnotesize\ttfamily,
   showstringspaces=false,
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   numbers=left,
   numberstyle=\footnotesize,
   numbersep=9pt,
   tabsize=2,
   breaklines=true,
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   captionpos=b
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\lstset{breaklines=true, language=JavaScript}
\begin{lstlisting}
{"count": 868, "time_first": 1298398002, "rrtype": "A", "rrname": "www.terena.org", "rdata": "192.87.30.6", "time_last": 1383124252}
{"count": 89, "time_first": 1383729690, "rrtype": "CNAME", "rrname": "www.terena.org", "rdata": "godzilla.terena.org", "time_last": 1391517643}
{"count": 110, "time_first": 1298398002, "rrtype": "AAAA", "rrname": "www.terena.org", "rdata": "2001:610:148:dead::6", "time_last": 136670845}
\end{lstlisting}
\end{frame}


\begin{frame}[t]{Mandatory fields}
\begin{itemize}
\item \textbf{rrname} : name of the queried resource records
\begin{itemize}
\item JSON String
\end{itemize}
\item \textbf{rrtype} : resource record type
\begin{itemize}
\item JSON String (interpreted type of resource type if known)
\end{itemize}
\item \textbf{rdata} : resource records of the query(ied) resource(s)
\begin{itemize}
\item JSON String or an array of string if more than one unique triple
\end{itemize}
\item \textbf{time\_first} : first time that the resource record triple (rrname, rrtype, rdata) was seen
\item \textbf{time\_last} : last time that the resource record triple (rrname, rrtype, rdata) was seen
\begin{itemize}
\item JSON Number (epoch value) UTC TZ
\end{itemize}
\end{itemize}
\end{frame}

\begin{frame}[t]{Optional fields}
\begin{itemize}
\item \textbf{count} : how many authoritative DNS answers were received by the Passive DNS collector
\begin{itemize}
\item JSON Number
\end{itemize}
\item \textbf{bailiwick} : closest enclosing zone delegated to a nameserver served in the zone of the resource records
\begin{itemize}
\item JSON String
\end{itemize}

\end{itemize}
\end{frame}

\begin{frame}[t]{Additionals fields}
\begin{itemize}
\item \textbf{sensor\_id} : Passive DNS sensor information
\begin{itemize}
\item JSON String
\end{itemize}
\item \textbf{zone\_time\_first} : specific first/last time seen when imported from a master file
\item \textbf{zone\_time\_last}
\begin{itemize}
\item JSON Number
\end{itemize}
\item Additional fields can be requested via \url{https://github.com/adulau/pdns-qof/wiki/Additional-Fields}
\end{itemize}
\end{frame}


\begin{frame}[t]{Future works}
\begin{itemize}
\item IETF 89 London to review the internet-draft with the dnsop WG
\item Incorporate all the comments and feedback from recently discovered Passive DNS (servers/clients) developers
\item Expand the sample implementations to help developers to support the format
\item An internet-draft for the query interface to Passive DNS systems is under preparation
\end{itemize}
\end{frame}

\begin{frame}[t]{Contact}

\begin{itemize}
\item \url{https://datatracker.ietf.org/doc/draft-dulaunoy-kaplan-passive-dns-cof/}
\item Don't hesitate to contact us. Feedback and updates are welcomed:
\item alexandre.dulaunoy@circl.lu - CIRCL
\item kaplan@cert.at - CERT.at
\item paul@redbarn.org - Farsight Security, Inc
\item henry@stern.ca - Farsight Security, Inc.
\end{itemize}
\end{frame}



