These steps set up remote access to a home network using an ssh tunnel to a DreamCompute host.

1. At the DreamCompute Access and Security panel…
   1. Create a new Security Group ruleset. Add rules to open the desired ports, including port 22 for ssh. For example, to open port 22 use parameters: Custom TCP Rule, Ingress, Port 22, Remote CIDR = 0.0.0.0/0.
   2. Create a Key Pair, download the public key (e.g., cloud.pem), and put it in the home server ~/.ssh directory.
2. At the DreamCompute Instances panel, launch a new instance (Boot Source Image Ubuntu 16.04, Flavor gp1.subsonic), selecting the newly created Security Group and Key Pair.
3. Create an A-type DNS record for the DreamCompute IP address with a name like casa.example.com.
4. Using ssh from home machine, connect to Dreamhost instance (e.g., ssh -i .ssh/cloud.pem ubuntu@casa.example.com. Edit /etc/ssh/sshd_config and add this at the end (assuming default user is ubuntu):

   ClientAliveInterval 30
   ClientAliveCountMax 3
   
   Match User ubuntu
       GatewayPorts yes

5. To create and test the tunnel use the command below on the home server, then try to connect to port 12345 on casa.example.com.

   $ ssh -NR '*:12345:192.168.1.123:54321' casa.example.com

6. On home server, create a ~/.ssh/config file with something like this…

   Host tunnel
   HostName casa.example.com
   User ubuntu
   IdentityFile ~/.ssh/cloud.pem
   BatchMode yes
   EscapeChar none
   RemoteForward *:9190 192.168.1.190:2190
   RemoteForward *:9191 192.168.1.191:2191
   RemoteForward *:9999 192.168.1.192:2222

7. Add this line to crontab:

   @reboot autossh -fN tunnel

1. DreamCompute instance
2. sshd_config manpage
3. autossh manpage