Etherpad is insecure by default.
To secure etherpad edit
/usr/local/etherpad/trunk/etherpad/etc/etherpad.localdev-default.properties
Add the line (if it doesn’t already exist – it exists by default)
etherpad.adminPass = password
Replace password with your password
Edit the line
etherpad.isProduction = false
To read
etherpad.isProduction = true
Save the file and restart etherpad.