Digi TX54, User Manual

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Firewall Firewall configuration
TX54 User Guide 792
Firewall configuration
Firewall configuration includes the following configuration options:
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Zones : A zone is a firewall access group to which network interfaces can be added. You then
use zones to configure packet filtering and access control lists for interfaces that are included
in the zone. Preconfigured zones include:
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Any : Matches any network interface, even if they are not assigned to this zone.
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Loopback : Zone for interfaces that are used for communication between processes
running on the device.
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Internal : Used for interfaces connected to trusted networks. By default, the firewall will
allow most access from this zone.
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External : Used for interfaces to connect to untrusted zones, such as the internet. This zone
has Network Address Translation (NAT) enabled by default. By default, the firewall will
block most access from this zone.
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Edge : Used for interfaces connected to trusted networks, where the device is a client on
the edge of the network rather than a router or gateway.
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Setup : Used for interfaces involved in the initial setup of the device. By default, the firewall
will only allow this zone to access administration services.
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IPsec : The default zone for IPsec tunnels.
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hotspot : The default zone for hotspots.
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Dynamic routes : Used for routes learned using routing services.
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Port forwarding : A list of rules that allow network connections to the TX54 to be forwarded to
other servers by translating the destination address.
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Packet filtering : A list of packet filtering rules that determine whether to accept or reject
network connections that are forwarded through the TX54.
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Custom rules : A script that is run to install advanced firewall rules beyond the
scope/capabilities of the standard device configuration.
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Captive portals : A list of captive portals that restrict traffic on network interfaces until access
is granted. Captive portals are commonly used on public-access networks to require users to
login or accept terms and conditions before accessing the internet.
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Quality Of Service : Quality of Service (QOS) options for bandwidth allocation and policy-
based traffic shaping and prioritizing.
Create a custom firewall zone
In addition to the preconfigured zones, you can create your custom zones that can be used to
configure packet filtering and access control lists for network interfaces.
To create a zone:
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