  We present a realistic, simple and natural model of strongly-interacting dark
matter based on the neutrino-portal paradigm. The strong interactions at small
velocities are generated by the exchange of dark photons, and produce the
observed core-like DM distribution in galactic centers; this effect could be
spoiled by the formation of DM bound states (also due to dark-photon effects),
which we avoid by requiring the DM candidates to be light, with masses below
O(10 GeV). The mixing of the dark photon with the Z and ordinary photon is
strongly suppressed by introducing a softly-broken discrete symmetry similar to
charge conjugation, which also ensures that the dark photon life-time is short
enough to avoid restrictions derived form big-bang nucleosynthesis and
large-scale structure formation. Other constraints are accommodated without the
need of fine tuning, in particular nucleon scattering occurs only at one loop,
so direct detection cross sections are naturally suppressed. Neutrino masses
are generated through the inverse see saw.
