  The production of multiple gauge bosons via weak boson fusion is an important
process at the LHC. It is relevant as a background process appearing in many
searches and measurements, but also serves as a signal process when studying
new-physics contributions to triple and in particular quartic gauge boson
vertices.
  We first review the theoretical status of multi-boson production in weak
boson fusion and present the current state of the art. In the second part, the
impact of anomalous gauge couplings on this class of processes is discussed.
