Having proved the concept using netcat, we need to add access control and make it accessible via a discoverable external address. The design is essentially the same, running the video capture command on the Pi and routing the output stream over IP to a remote client, but we use ssh (Secure SHell) as the transport to add authentication and encryption.
The first thing to do before exposing your Pi to the outside world is: change the default password! With Raspbian, the default admin user name and password is “pi” and “raspberry”. You should change the password to something that’s not based on a name or word that could be found in a cracking dictionary; best would be a randomly generated password that you write down and keep with you, or you can use initial letters of words in a sentence you can remember but others can’t guess. For extra security you could change the name of the admin account too.
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