By default, when you get your Anonabox ssh is turned off. You will need to enable it from within the admin interface before you can connect. The name of the ssh server that runs on the Anonabox is called dropbear. You need to start dropbear and tell it to listen for SSH connections. You can do this by adding a dropbear instance on the device by clicking 'system' –> administration from within the admin interface. On that page there is a button to create a dropbear instance. Click that button. Then scroll down to the bottom of that page and click “save and apply”. You can now log into the device using the password you set as as the general admin password and username root. The default port is 22.
In order to get access to ssh on the device, you will need to turn Tor off, if you have Tor running, it will redirect your ssh traffic back out over the Tor network instead of the local interface on the device.
If you are on a windows machine, you can use a free ssh client program called putty downloadable here: http://www.chiark.greenend.org.uk/~sgtatham/putty/latest.html
In MacOS, you can just use the built in terminal application. To open the Terminal app, click Go in the top menu, then select Utilities, then click Terminal.app. The command for MacOS is ssh firstname.lastname@example.org