Vapor and reverse forwarding

I would like some help in configuring Vapor, since I couldn’t figure out what to do after reading the documentation.
Here is the situation: I am behind a NAT/firewall and my mac’s address is 10.0.3.122 on the local network, and from the oustide shcool.network.com.

I would like a mac (outside.mac.com) from the outside to be able to access to my files through appleshare. I have been able to ssh to outside.mac.com so I guess things should work, but I don’t know where to put the 10.0.3.122 or the school.network.com….

From what I have figured, I should put oustide.mac.com in the SSH Server, select “reverse” in the advanced settings, and in the remote server put 10.0.3.122 ???? or shcool.network.com ???

Thanks for any help!