I have an IC-718 with a DigiRig. I've been pretty successful using this with WSJT-X with it set to use OmniRig. Since this radio doesn't have PTT through CAT, the DigiRig will do it through RTS being brought high. So in WSJT-X I set PTT Method to RTS and for port, they give you an option of CAT, which is supposed to use the same port as OmniRig (I'm not sure what happens internally in code for this setting).
Anyway, if I try to use the same setup in Varac, I get a Access Denied on the port when trying to test PTT. I can't seem to get VOX to work, both in Varac and in WSJT-X, so is there something I need to do to get this working like wsjt-x does?