You could try to modify the firewall settings go under advanced settings to firewall and then modify the wan interface to allow incoming traffic

i havent tried it before to use the little router in my existing network :slight_smile:

 

And yes, ssh is port 22 but you try it to access with the wan port and i think this could be the problem under Advanced -> System -> Administration you could select the wan interface for dropbear… Maybe it´s working… maybe not i dont know but i would like to help anyways! :smiley: