Connecting to instances of Microstack from outside

Hey! (I’m learning English sorry :p) I’m doing my graduation project, I’m using Microstack. I have almost everything done, I only have to allow the acces to the VMs outside the server. This server is in a VPN, my computer to. I need to Connect my pc vía ssh to an Instance but when I try to Connect by the Microstack default command to Connect I got timeout error. I tried everything like creating a new router and nets but it didn’t work…