Originally Posted by till
The manual that you link to is for a different software "ISPConfig 2" and not for "ISPConfig 3".
The Firewall in ISPConfig 3 is under System > Firewall.
Yes I found that but it has only a few options
Open TCP ports
Open UDP ports
Let say I want to block SSH port 22 or any other service port except while I'm connected through VPN which gives me a certain static IP. Other than my IP the rest will be blocked for that port.
I don't think I can do it only with those 4 options.