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72 lines
2.9 KiB
ReStructuredText
72 lines
2.9 KiB
ReStructuredText
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###########
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Zone Policy
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###########
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.. toctree::
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:maxdepth: 1
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:includehidden:
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In zone-based policy, interfaces are assigned to zones, and inspection policy is applied to traffic moving between the zones and acted on according to firewall rules.
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A Zone is a group of interfaces that have similar functions or features. It establishes the security borders of a network.
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A zone defines a boundary where traffic is subjected to policy restrictions as it crosses to another region of a network.
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Key Points:
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* A zone must be configured before an interface is assigned to it and an interface can be assigned to only a single zone.
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* All traffic to and from an interface within a zone is permitted.
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* All traffic between zones is affected by existing policies
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* Traffic cannot flow between zone member interface and any interface that is not a zone member.
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* You need 2 separate firewalls to define traffic: one for each direction.
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Example: LAN Network is given SSH access to VyOS box.
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Firewall rules:
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.. code-block:: none
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set firewall name lan-local default-action 'drop'
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set firewall name lan-local rule 1 action 'accept'
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set firewall name lan-local rule 1 state established 'enable'
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set firewall name lan-local rule 1 state related 'enable'
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set firewall name lan-local rule 2 action 'drop'
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set firewall name lan-local rule 2 state invalid 'enable'
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set firewall name lan-local rule 2 log enable
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set firewall name lan-local rule 100 action 'accept'
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set firewall name lan-local rule 100 destination port '22'
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set firewall name lan-local rule 100 log 'enable'
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set firewall name lan-local rule 100 protocol 'tcp'
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set firewall name local-lan default-action 'drop'
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set firewall name local-lan rule 1 action 'accept'
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set firewall name local-lan rule 1 state established 'enable'
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set firewall name local-lan rule 1 state related 'enable'
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set firewall name local-lan rule 2 action 'drop'
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set firewall name local-lan rule 2 state invalid 'enable'
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set firewall name local-lan rule 2 log enable
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set firewall name local-lan rule 100 action 'accept'
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set firewall name local-lan rule 100 destination address '192.168.0.0/24'
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set firewall name local-lan rule 100 log 'enable'
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set firewall name local-lan rule 100 protocol 'tcp'
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Zone-policy Config:
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.. code-block:: none
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set zone-policy zone lan default-action 'drop'
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set zone-policy zone lan description 'Local Area Network'
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set zone-policy zone lan interface 'eth2'
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set zone-policy zone lan from local firewall name 'lan-local'
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set zone-policy zone local default-action 'drop'
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set zone-policy zone local description 'system-defined zone'
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set zone-policy zone local from lan firewall name 'local-lan'
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set zone-policy zone local local-zone
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A detailed zone-based policy example is written in the Configuration-Blueprints_ section.
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.. stop_vyoslinter
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.. _Configuration-Blueprints: https://docs.vyos.io/en/latest/configexamples/zone-policy.html
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.. start_vyoslinter
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