Digi LR54 User Manual page 249

Serial port
n
To limit access to specified IPv4 addresses and networks:
n
(config)> add serial port1 udp acl address end value
(config)>
Where value can be:
l
l
l
LR54 User Guide
defaultlinklocal
lan1
loopback
wan1
wwan
(config)>
Repeat this step to list additional interfaces.
To limit access based on firewall zones:
(config)> add serial port1 udp acl zone end value
(config)>
Where value is a firewall zone defined on your device, or the any keyword.
Display a list of available firewall zones:
Type ... firewall zone ? at the config prompt:
(config)> ... firewall zone ?
Zones: A list of groups of network interfaces that
can be referred to by packet
filtering rules and access control lists.
Additional Configuration
----------------------------------------------------
---------------------------
any
dynamic_routes
edge
external
hotspot
internal
ipsec
loopback
setup
(config)>
Repeat this step to include additional firewall zones.
A single IP address or host name.
A network designation in CIDR notation, for example, 192.168.1.0/24.
any: No limit to IPv4 addresses that can access the service-type.
Configure UDP serial mode
Default Link-local IP
LAN1
Loopback
WAN1
WWAN
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