\begin{frame}[fragile]
\frametitle{openL2TP}
\begin{itemize}
\item configurable to use Internet Protocol Security (IPsec)
\item Pros:
  \begin{itemize}
  \item easy configuration
  \item integration in existing Network infrastructures (e.g. NAT)
  \item good security level (depends on configuration)
  \end{itemize}
\item Cons:
  \begin{itemize}
  \item scalability
  \item not recommended for Infrastructure installations
  \end{itemize}
\end{itemize}
\end{frame}