Command line:
Elements/objects that are to be used in the firewall rules table are defined in the objects table. Objects can be:
- Individual computers (MAC or IP address, host name)
- Complete networks
- Protocols
- Services (ports or port areas, e.g. HTTP, Mail&News, FTP,…)
These elements can be combined and hierarchically structured in any way. For example, objects for the TCP and UDP protocols can be defined first. Building upon this, objects can subsequently be created, for example, for FTP (= TCP + ports 20 and 21), HTTP (= TCP + port 80) and DNS (= TCP, UDP + port 53). These can in turn be combined into one object that contains all the definitions of the individual objects.
