  Astrophysical shocks are very common and are interesting as they are
responsible for particle acceleration in supernovas, blazers, and neutron
stars. In this work, we study general relativistic shocks from the frame of the
front. We derive the jump conditions and the Taub adiabat equation for both the
space-like and time-like shocks. We solve these equations in a neutron star
system where the shock is followed by a combustion front which is deconfining
hadronic matter to quark matter. The maximum mass of the daughter quark star
(generated from the combustion of the parent neutron star) is consistent with
the maximum mass limit for the EoS sequence. We find that matter velocities for
GR shocks under suitable conditions can break the speed of light limit
indicating a very fast combustion process. Also, the matter velocities imply
that for space-like shocks the combustion process is most probably a
deflagration and for time-like shocks, it is a detonation and can even proceed
with velocities that are super-luminous.
