https://portforward.com/smoothwall/express-3-0/
Simple SmoothWall Express 3.0 Router Open Port Guide
With this guide you can easily open ports on the SmoothWall Express 3.0 router in 4 steps. It only takes 5 minutes.
smoothwall expressopen portsimplerouterguide
https://www.linuxjournal.com/content/smoothwall-express
Smoothwall Express | Linux Journal
smoothwall expresslinux journal