mirror of https://github.com/opnsense/docs
Firewall - make some room for more generic topics and start explaining the different address types.
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===========================
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Generic info
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===========================
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This chapter explains some of the concepts that are being used in different modules of our firewall system and
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therefore don't belong to a specific section of this topic.
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-----------------------------------------
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Address types
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-----------------------------------------
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When choosing source and or destination addresses, the user can choose several options depending on the context.
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To explain what the different options mean when being presented, we will sum them up below:
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========================================================================================================================================================
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==================================== ==================================================================================================================
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Alias Flexible type of network or address definition for easy reuse, expained in
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:doc:`aliases </manual/aliases>`
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Single host or network Standard host or network in `CIDR notation <https://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing>`__
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any All IPv4 and/or IPv6 addresses (in the world)
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This Firewall All IPv4 and/or IPv6 addresses assigned to this firewall
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[Interface] Network All networks assigned to the physical interface, this will include networks of virtual addresses assigned as well
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([Interface] is explained in the :doc:`interfaces </manual/interfaces>` topic). Normally used to allow traffic
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from or to clients connected to a specific interface.
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[Interface] Address All addresses configured on an interface, this includes all virtual (alias) addresses as well.
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Virtual IPs Explicit selection for addresses defined in :doc:`Virtual IPs </manual/firewall_vip>`
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==================================== ==================================================================================================================
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