I couldn’t figure out how to SSH into my Vim2 Max over my network with with some digging around I finally was able to. Using a combination of sources.
I am using a Lynksys WRT54G wireless router and connecting through wifi. The same process should be able to allow users to replicate the same results.
Step 1: Find your Vim2’s IP address by opening up terminal and type: hostname -I this will display your vims ip address.
Step 2: Login to router, most routers local ip address is 192.168.1.1 default user and pass are normally admin and admin
Step 3: Go to the Applications and Gaming tab and ensure you are at the Port Range Forward tab.
Step 4: Input ssh into the first block 22 in the 2nd and 3rd block then the last 3 digits of your vims ip address into the ip block. Click save changes.
Step 5: (I am using a Mac and using terminal, you can use putty for wndows)Open a terminal window.
Type: ssh username@192.168.1.XXX where the username is your username setup on your vim and xxx is the last 3 digits of your vim.
You should now be greeted with something like:
The authenticity of host ‘192.168.1.117 (192.168.1.117)’ can’t be established.
ECDSA key fingerprint is SHA256:/0ZlsQu0lgs5Vnp2WI5WzxBh2n4RD2IX9A9svVKBs9I.
Are you sure you want to continue connecting (yes/no)?
Type yes
Enter your password to login.
I haven’t tried yet but I assume with the same process you could setup your own local webserver using DynDNS at http://dyn.com/dns/
Hope this explains things well and helps someone else out in the process.
I’m a web developer and not a network or OS engineer, but I’m learning 
Sources used:
I did some research and I managed to ssh into my khadas via Windows using puTTY. I have Ubuntu Mate running on my Khadas VIM2. I followed this tutorial which was extremely easy: