Digi LR54 User Manual page 239

Serial port
The default is 10.
13. Set the firewall zone for this interface. This can be used by packet filtering rules and access
control lists to restrict network traffic on this interface.
a. Use the ? to determine available zones:
(config)> serial port1 ppp_dialin zone ?
Zone: The firewall zone assigned to this interface. This can be used
by packet
filtering rules and access control lists to restrict network traffic
on this
interface.
Format:
any
dynamic_routes
edge
external
hotspot
internal
ipsec
loopback
setup
Default value: internal
Current value: internal
(config)>
b. Set the zone:
(config)> serial port1 ppp_dialin zone zone
(config)>
14. (Optional) Configure the serial port to use a custom PPP configuration file:
a. Enable the use of a custom PPP configuration file:
(config)> serial port1 ppp_dialin custom enable true
(config)>
b. Enable override to override the default PPP configuration and only use the custom
configuration file:
(config)> serial port1 ppp_dialin custom override true
(config)>
If override is not enabled, the custom PPP configuration file is used in addition to the
default configuration.
c. Paste or type the configuration data in the format of a pppd options file:
(config)> serial port1 ppp_dialin custom config_file data
(config)>
LR54 User Guide
Configure PPP dial-in mode
239