NATT_FORCE
natt_mode = NATT_FORCE;
if (natt_mode == NATT_FORCE)
natt_mode = NATT_FORCE;
if (env->sc_nattmode != NATT_FORCE)
if (env->sc_nattmode != NATT_FORCE)
if (env->sc_nattmode == NATT_FORCE)