Generic info

This chapter explains some of the concepts that are used in different modules of our firewall system and therefore don’t belong to a specific section of this topic.

Address types

When choosing source and/or destination addresses, the user can choose several options depending on the context. To explain what the different options mean when being presented, we will summarize them below:

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Alias	Flexible type of network or address definition for easy reuse, expained in aliases
Single host or network	Standard host or network in CIDR notation
any	All IPv4 and/or IPv6 addresses (in the world)
This Firewall	All IPv4 and/or IPv6 addresses assigned to this firewall
[Interface] Network	All networks assigned to the device, this will also include networks of assigned virtual addresses ([Interface] is explained in the interfaces topic). Normally used to allow traffic from or to clients connected to a specific interface.
[Interface] Address	All addresses configured on an interface, this includes all virtual (alias) addresses as well.
Virtual IPs	Explicit selection for addresses defined in Virtual IPs