Much in the same way as for CMP and EST, we want to support forwarding SCEP requests heading for the CA via an RA over peers.
This shouldn't be inherently difficult, as it's already been implemented for CMP and EST in RaMasterApi as
org.ejbca.core.model.era.RaMasterApi.cmpDispatch(AuthenticationToken, byte, String)
org.ejbca.core.model.era.RaMasterApi.estDispatch(String, String, X509Certificate, String, String, byte)
Focus for now should simply be to forward the payload to the CA as is and passing on the response. Basic checks of the validity of the SCEP message should be done on the RA.